diff --git a/source/blender/editors/io/io_obj.cc b/source/blender/editors/io/io_obj.cc
index 5a2ed5bb081..6e76e821b33 100644
--- a/source/blender/editors/io/io_obj.cc
+++ b/source/blender/editors/io/io_obj.cc
@@ -36,9 +36,9 @@
 
 #  include "DEG_depsgraph.h"
 
-#  include "IO_orientation.h"
-#  include "IO_path_util_types.h"
-#  include "IO_wavefront_obj.h"
+#  include "IO_orientation.hh"
+#  include "IO_path_util_types.hh"
+#  include "IO_wavefront_obj.hh"
 
 #  include "io_obj.hh"
 
diff --git a/source/blender/editors/io/io_ply_ops.cc b/source/blender/editors/io/io_ply_ops.cc
index 7f9e914617e..34a023a69e2 100644
--- a/source/blender/editors/io/io_ply_ops.cc
+++ b/source/blender/editors/io/io_ply_ops.cc
@@ -32,10 +32,10 @@
 
 #  include "DEG_depsgraph.h"
 
-#  include "IO_orientation.h"
-#  include "IO_path_util_types.h"
+#  include "IO_orientation.hh"
+#  include "IO_path_util_types.hh"
 
-#  include "IO_ply.h"
+#  include "IO_ply.hh"
 #  include "io_ply_ops.hh"
 
 static const EnumPropertyItem ply_vertex_colors_mode[] = {
diff --git a/source/blender/editors/io/io_stl_ops.cc b/source/blender/editors/io/io_stl_ops.cc
index 7406c2e9597..777dfc2631a 100644
--- a/source/blender/editors/io/io_stl_ops.cc
+++ b/source/blender/editors/io/io_stl_ops.cc
@@ -21,7 +21,7 @@
 #  include "RNA_access.hh"
 #  include "RNA_define.hh"
 
-#  include "IO_stl.h"
+#  include "IO_stl.hh"
 #  include "io_stl_ops.hh"
 
 static int wm_stl_import_invoke(bContext *C, wmOperator *op, const wmEvent *event)
diff --git a/source/blender/io/alembic/intern/alembic_capi.cc b/source/blender/io/alembic/intern/alembic_capi.cc
index 7f9e1c86f11..6e10dcf39fc 100644
--- a/source/blender/io/alembic/intern/alembic_capi.cc
+++ b/source/blender/io/alembic/intern/alembic_capi.cc
@@ -7,7 +7,7 @@
  */
 
 #include "../ABC_alembic.h"
-#include "IO_types.h"
+#include "IO_types.hh"
 
 #include <Alembic/AbcMaterial/IMaterial.h>
 
diff --git a/source/blender/io/common/CMakeLists.txt b/source/blender/io/common/CMakeLists.txt
index 199ba18583d..19df27fcb96 100644
--- a/source/blender/io/common/CMakeLists.txt
+++ b/source/blender/io/common/CMakeLists.txt
@@ -22,10 +22,10 @@ set(SRC
 
   IO_abstract_hierarchy_iterator.h
   IO_dupli_persistent_id.hh
-  IO_orientation.h
+  IO_orientation.hh
   IO_path_util.hh
-  IO_path_util_types.h
-  IO_types.h
+  IO_path_util_types.hh
+  IO_types.hh
   intern/dupli_parent_finder.hh
 )
 
diff --git a/source/blender/io/common/IO_orientation.h b/source/blender/io/common/IO_orientation.hh
similarity index 51%
rename from source/blender/io/common/IO_orientation.h
rename to source/blender/io/common/IO_orientation.hh
index 6c73c851ca4..4da659eaea1 100644
--- a/source/blender/io/common/IO_orientation.h
+++ b/source/blender/io/common/IO_orientation.hh
@@ -4,29 +4,21 @@
 
 #pragma once
 
-#include "RNA_types.hh"
-
+struct EnumPropertyItem;
 struct Main;
+struct PointerRNA;
 struct Scene;
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef enum {
+enum eIOAxis {
   IO_AXIS_X = 0,
   IO_AXIS_Y = 1,
   IO_AXIS_Z = 2,
   IO_AXIS_NEGATIVE_X = 3,
   IO_AXIS_NEGATIVE_Y = 4,
   IO_AXIS_NEGATIVE_Z = 5,
-} eIOAxis;
+};
 
 extern const EnumPropertyItem io_transform_axis[];
 
-void io_ui_forward_axis_update(struct Main *main, struct Scene *scene, struct PointerRNA *ptr);
-void io_ui_up_axis_update(struct Main *main, struct Scene *scene, struct PointerRNA *ptr);
-
-#ifdef __cplusplus
-}
-#endif
+void io_ui_forward_axis_update(Main *main, Scene *scene, PointerRNA *ptr);
+void io_ui_up_axis_update(Main *main, Scene *scene, PointerRNA *ptr);
diff --git a/source/blender/io/common/IO_path_util.hh b/source/blender/io/common/IO_path_util.hh
index ca4b73cb0e7..22c5675b50a 100644
--- a/source/blender/io/common/IO_path_util.hh
+++ b/source/blender/io/common/IO_path_util.hh
@@ -6,7 +6,7 @@
 #include "BLI_set.hh"
 #include "BLI_string_ref.hh"
 
-#include "IO_path_util_types.h"
+#include "IO_path_util_types.hh"
 
 namespace blender::io {
 
diff --git a/source/blender/io/common/IO_path_util_types.h b/source/blender/io/common/IO_path_util_types.hh
similarity index 94%
rename from source/blender/io/common/IO_path_util_types.h
rename to source/blender/io/common/IO_path_util_types.hh
index 80bbdc123d0..3a709d3264a 100644
--- a/source/blender/io/common/IO_path_util_types.h
+++ b/source/blender/io/common/IO_path_util_types.hh
@@ -4,7 +4,7 @@
 #pragma once
 
 /** Method used to reference paths. Equivalent of bpy_extras.io_utils.path_reference_mode. */
-typedef enum {
+enum ePathReferenceMode {
   /** Use relative paths with subdirectories only. */
   PATH_REFERENCE_AUTO = 0,
   /** Always write absolute paths. */
@@ -17,4 +17,4 @@ typedef enum {
   PATH_REFERENCE_STRIP = 4,
   /** Copy the file to the destination path. */
   PATH_REFERENCE_COPY = 5,
-} ePathReferenceMode;
+};
diff --git a/source/blender/io/common/IO_types.h b/source/blender/io/common/IO_types.hh
similarity index 100%
rename from source/blender/io/common/IO_types.h
rename to source/blender/io/common/IO_types.hh
diff --git a/source/blender/io/common/intern/orientation.cc b/source/blender/io/common/intern/orientation.cc
index fcd8e07a052..629b3789dea 100644
--- a/source/blender/io/common/intern/orientation.cc
+++ b/source/blender/io/common/intern/orientation.cc
@@ -7,7 +7,7 @@
 #include "RNA_access.hh"
 #include "RNA_types.hh"
 
-#include "IO_orientation.h"
+#include "IO_orientation.hh"
 
 const EnumPropertyItem io_transform_axis[] = {
     {IO_AXIS_X, "X", 0, "X", "Positive X axis"},
diff --git a/source/blender/io/ply/CMakeLists.txt b/source/blender/io/ply/CMakeLists.txt
index 5de46468f06..a80be008d46 100644
--- a/source/blender/io/ply/CMakeLists.txt
+++ b/source/blender/io/ply/CMakeLists.txt
@@ -46,7 +46,7 @@ set(SRC
   importer/ply_import_buffer.hh
   importer/ply_import_data.hh
   importer/ply_import_mesh.hh
-  IO_ply.h
+  IO_ply.hh
 
   intern/ply_data.hh
 )
diff --git a/source/blender/io/ply/IO_ply.cc b/source/blender/io/ply/IO_ply.cc
index 189d291d512..872d0461722 100644
--- a/source/blender/io/ply/IO_ply.cc
+++ b/source/blender/io/ply/IO_ply.cc
@@ -9,7 +9,7 @@
 #include "BLI_timeit.hh"
 
 #include "DNA_windowmanager_types.h"
-#include "IO_ply.h"
+#include "IO_ply.hh"
 #include "ply_export.hh"
 #include "ply_import.hh"
 
diff --git a/source/blender/io/ply/IO_ply.h b/source/blender/io/ply/IO_ply.hh
similarity index 81%
rename from source/blender/io/ply/IO_ply.h
rename to source/blender/io/ply/IO_ply.hh
index e1c973f8a90..248e7bf75ec 100644
--- a/source/blender/io/ply/IO_ply.h
+++ b/source/blender/io/ply/IO_ply.hh
@@ -12,17 +12,13 @@
 
 #include "BLI_path_util.h"
 #include "DNA_windowmanager_types.h"
-#include "IO_orientation.h"
+#include "IO_orientation.hh"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef enum {
+enum ePLYVertexColorMode {
   PLY_VERTEX_COLOR_NONE = 0,
   PLY_VERTEX_COLOR_SRGB = 1,
   PLY_VERTEX_COLOR_LINEAR = 2,
-} ePLYVertexColorMode;
+};
 
 struct PLYExportParams {
   /** Full path to the destination .PLY file. */
@@ -64,10 +60,6 @@ struct PLYImportParams {
 /**
  * C-interface for the importer and exporter.
  */
-void PLY_export(bContext *C, const struct PLYExportParams *export_params);
+void PLY_export(bContext *C, const PLYExportParams *export_params);
 
-void PLY_import(bContext *C, const struct PLYImportParams *import_params, wmOperator *op);
-
-#ifdef __cplusplus
-}
-#endif
+void PLY_import(bContext *C, const PLYImportParams *import_params, wmOperator *op);
diff --git a/source/blender/io/ply/exporter/ply_export.cc b/source/blender/io/ply/exporter/ply_export.cc
index bc4047c43cf..d353af51eb2 100644
--- a/source/blender/io/ply/exporter/ply_export.cc
+++ b/source/blender/io/ply/exporter/ply_export.cc
@@ -13,7 +13,7 @@
 
 #include "BKE_context.h"
 #include "BLI_memory_utils.hh"
-#include "IO_ply.h"
+#include "IO_ply.hh"
 
 #include "ply_data.hh"
 #include "ply_export.hh"
diff --git a/source/blender/io/ply/exporter/ply_export_header.cc b/source/blender/io/ply/exporter/ply_export_header.cc
index cfee43678d4..50eddbe550a 100644
--- a/source/blender/io/ply/exporter/ply_export_header.cc
+++ b/source/blender/io/ply/exporter/ply_export_header.cc
@@ -8,7 +8,7 @@
 
 #include "BKE_blender_version.h"
 
-#include "IO_ply.h"
+#include "IO_ply.hh"
 #include "ply_data.hh"
 #include "ply_export_header.hh"
 #include "ply_file_buffer.hh"
diff --git a/source/blender/io/ply/exporter/ply_export_load_plydata.cc b/source/blender/io/ply/exporter/ply_export_load_plydata.cc
index a72d1fdf7f6..88bd818d32c 100644
--- a/source/blender/io/ply/exporter/ply_export_load_plydata.cc
+++ b/source/blender/io/ply/exporter/ply_export_load_plydata.cc
@@ -7,7 +7,7 @@
  */
 
 #include "ply_export_load_plydata.hh"
-#include "IO_ply.h"
+#include "IO_ply.hh"
 #include "ply_data.hh"
 
 #include "BKE_attribute.hh"
diff --git a/source/blender/io/ply/importer/ply_import.hh b/source/blender/io/ply/importer/ply_import.hh
index f461f41d410..adf80e0a6e1 100644
--- a/source/blender/io/ply/importer/ply_import.hh
+++ b/source/blender/io/ply/importer/ply_import.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "IO_ply.h"
+#include "IO_ply.hh"
 #include "ply_data.hh"
 
 namespace blender::io::ply {
diff --git a/source/blender/io/ply/importer/ply_import_mesh.hh b/source/blender/io/ply/importer/ply_import_mesh.hh
index aa6f30fb413..fc75040f595 100644
--- a/source/blender/io/ply/importer/ply_import_mesh.hh
+++ b/source/blender/io/ply/importer/ply_import_mesh.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "IO_ply.h"
+#include "IO_ply.hh"
 #include "ply_data.hh"
 
 namespace blender::io::ply {
diff --git a/source/blender/io/ply/tests/io_ply_exporter_test.cc b/source/blender/io/ply/tests/io_ply_exporter_test.cc
index be552dd31b5..de6bd2f6a02 100644
--- a/source/blender/io/ply/tests/io_ply_exporter_test.cc
+++ b/source/blender/io/ply/tests/io_ply_exporter_test.cc
@@ -12,7 +12,7 @@
 
 #include "DEG_depsgraph.h"
 
-#include "IO_ply.h"
+#include "IO_ply.hh"
 #include "intern/ply_data.hh"
 
 #include "ply_export_data.hh"
diff --git a/source/blender/io/stl/CMakeLists.txt b/source/blender/io/stl/CMakeLists.txt
index 276640944dd..ad9ce3df02c 100644
--- a/source/blender/io/stl/CMakeLists.txt
+++ b/source/blender/io/stl/CMakeLists.txt
@@ -27,7 +27,7 @@ set(SRC
   importer/stl_import_binary_reader.cc
   importer/stl_import_mesh.cc
 
-  IO_stl.h
+  IO_stl.hh
   importer/stl_import.hh
   importer/stl_import_ascii_reader.hh
   importer/stl_import_binary_reader.hh
diff --git a/source/blender/io/stl/IO_stl.cc b/source/blender/io/stl/IO_stl.cc
index 205073be852..8a520c73575 100644
--- a/source/blender/io/stl/IO_stl.cc
+++ b/source/blender/io/stl/IO_stl.cc
@@ -8,7 +8,7 @@
 
 #include "BLI_timeit.hh"
 
-#include "IO_stl.h"
+#include "IO_stl.hh"
 #include "stl_import.hh"
 
 void STL_import(bContext *C, const STLImportParams *import_params)
diff --git a/source/blender/io/stl/IO_stl.h b/source/blender/io/stl/IO_stl.hh
similarity index 73%
rename from source/blender/io/stl/IO_stl.h
rename to source/blender/io/stl/IO_stl.hh
index 5957eba9a4a..ab8d62bd96b 100644
--- a/source/blender/io/stl/IO_stl.h
+++ b/source/blender/io/stl/IO_stl.hh
@@ -10,11 +10,7 @@
 
 #include "BKE_context.h"
 #include "BLI_path_util.h"
-#include "IO_orientation.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include "IO_orientation.hh"
 
 struct STLImportParams {
   /** Full path to the source STL file to import. */
@@ -30,8 +26,4 @@ struct STLImportParams {
 /**
  * C-interface for the importer.
  */
-void STL_import(bContext *C, const struct STLImportParams *import_params);
-
-#ifdef __cplusplus
-}
-#endif
+void STL_import(bContext *C, const STLImportParams *import_params);
diff --git a/source/blender/io/stl/importer/stl_import.hh b/source/blender/io/stl/importer/stl_import.hh
index 2ac1bdcc763..a375cea908d 100644
--- a/source/blender/io/stl/importer/stl_import.hh
+++ b/source/blender/io/stl/importer/stl_import.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "IO_stl.h"
+#include "IO_stl.hh"
 
 namespace blender::io::stl {
 
diff --git a/source/blender/io/usd/intern/usd_capi_import.cc b/source/blender/io/usd/intern/usd_capi_import.cc
index 5e98c6b2365..a3852119e25 100644
--- a/source/blender/io/usd/intern/usd_capi_import.cc
+++ b/source/blender/io/usd/intern/usd_capi_import.cc
@@ -2,7 +2,7 @@
  *
  * SPDX-License-Identifier: GPL-2.0-or-later */
 
-#include "IO_types.h"
+#include "IO_types.hh"
 #include "usd.h"
 #include "usd_hierarchy_iterator.h"
 #include "usd_reader_geom.h"
diff --git a/source/blender/io/wavefront_obj/CMakeLists.txt b/source/blender/io/wavefront_obj/CMakeLists.txt
index 542dde6161b..90a390c3c73 100644
--- a/source/blender/io/wavefront_obj/CMakeLists.txt
+++ b/source/blender/io/wavefront_obj/CMakeLists.txt
@@ -37,7 +37,7 @@ set(SRC
   importer/obj_import_string_utils.cc
   importer/obj_importer.cc
 
-  IO_wavefront_obj.h
+  IO_wavefront_obj.hh
   exporter/obj_export_file_writer.hh
   exporter/obj_export_io.hh
   exporter/obj_export_mesh.hh
diff --git a/source/blender/io/wavefront_obj/IO_wavefront_obj.cc b/source/blender/io/wavefront_obj/IO_wavefront_obj.cc
index 4ee6137e923..7aacfacf988 100644
--- a/source/blender/io/wavefront_obj/IO_wavefront_obj.cc
+++ b/source/blender/io/wavefront_obj/IO_wavefront_obj.cc
@@ -9,7 +9,7 @@
 #include "BLI_path_util.h"
 #include "BLI_timeit.hh"
 
-#include "IO_wavefront_obj.h"
+#include "IO_wavefront_obj.hh"
 
 #include "obj_exporter.hh"
 #include "obj_importer.hh"
diff --git a/source/blender/io/wavefront_obj/IO_wavefront_obj.h b/source/blender/io/wavefront_obj/IO_wavefront_obj.hh
similarity index 88%
rename from source/blender/io/wavefront_obj/IO_wavefront_obj.h
rename to source/blender/io/wavefront_obj/IO_wavefront_obj.hh
index e533caa351a..0d28bcd95dc 100644
--- a/source/blender/io/wavefront_obj/IO_wavefront_obj.h
+++ b/source/blender/io/wavefront_obj/IO_wavefront_obj.hh
@@ -8,15 +8,14 @@
 
 #pragma once
 
-#include "BKE_context.h"
 #include "BLI_path_util.h"
-#include "DEG_depsgraph.h"
-#include "IO_orientation.h"
-#include "IO_path_util_types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include "BKE_context.h"
+
+#include "DEG_depsgraph.h"
+
+#include "IO_orientation.hh"
+#include "IO_path_util_types.hh"
 
 struct OBJExportParams {
   /** Full path to the destination .OBJ file. */
@@ -83,13 +82,9 @@ struct OBJImportParams {
  * Import also changes the selection & the active object; callers
  * need to update the UI bits if needed.
  */
-void OBJ_import(bContext *C, const struct OBJImportParams *import_params);
+void OBJ_import(bContext *C, const OBJImportParams *import_params);
 
 /**
  * Perform the full export process.
  */
-void OBJ_export(bContext *C, const struct OBJExportParams *export_params);
-
-#ifdef __cplusplus
-}
-#endif
+void OBJ_export(bContext *C, const OBJExportParams *export_params);
diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.hh b/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.hh
index 7ee1fd5a92f..5e5c9c73c8e 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.hh
+++ b/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.hh
@@ -14,7 +14,7 @@
 #include "BLI_set.hh"
 #include "BLI_vector.hh"
 
-#include "IO_wavefront_obj.h"
+#include "IO_wavefront_obj.hh"
 #include "obj_export_io.hh"
 #include "obj_export_mtl.hh"
 
diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_mesh.hh b/source/blender/io/wavefront_obj/exporter/obj_export_mesh.hh
index 141bd17cbe6..a47b2679956 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_export_mesh.hh
+++ b/source/blender/io/wavefront_obj/exporter/obj_export_mesh.hh
@@ -20,7 +20,7 @@
 #include "DNA_meshdata_types.h"
 #include "DNA_object_types.h"
 
-#include "IO_wavefront_obj.h"
+#include "IO_wavefront_obj.hh"
 
 namespace blender::io::obj {
 /** Denote absence for usually non-negative numbers. */
diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_nurbs.cc b/source/blender/io/wavefront_obj/exporter/obj_export_nurbs.cc
index 32778d15de9..c2c908000f1 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_export_nurbs.cc
+++ b/source/blender/io/wavefront_obj/exporter/obj_export_nurbs.cc
@@ -15,7 +15,7 @@
 #include "DEG_depsgraph.h"
 #include "DEG_depsgraph_query.h"
 
-#include "IO_wavefront_obj.h"
+#include "IO_wavefront_obj.hh"
 #include "obj_export_nurbs.hh"
 
 namespace blender::io::obj {
diff --git a/source/blender/io/wavefront_obj/exporter/obj_exporter.hh b/source/blender/io/wavefront_obj/exporter/obj_exporter.hh
index 3acee2f181c..4180f29a254 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_exporter.hh
+++ b/source/blender/io/wavefront_obj/exporter/obj_exporter.hh
@@ -12,7 +12,7 @@
 
 #include "BLI_vector.hh"
 
-#include "IO_wavefront_obj.h"
+#include "IO_wavefront_obj.hh"
 
 namespace blender::io::obj {
 
diff --git a/source/blender/io/wavefront_obj/importer/importer_mesh_utils.cc b/source/blender/io/wavefront_obj/importer/importer_mesh_utils.cc
index f6e3f035e68..3963dfad3bf 100644
--- a/source/blender/io/wavefront_obj/importer/importer_mesh_utils.cc
+++ b/source/blender/io/wavefront_obj/importer/importer_mesh_utils.cc
@@ -18,7 +18,7 @@
 
 #include "DNA_object_types.h"
 
-#include "IO_wavefront_obj.h"
+#include "IO_wavefront_obj.hh"
 
 #include "importer_mesh_utils.hh"
 
diff --git a/source/blender/io/wavefront_obj/importer/obj_import_file_reader.hh b/source/blender/io/wavefront_obj/importer/obj_import_file_reader.hh
index bcfdf985767..d130fed6a7d 100644
--- a/source/blender/io/wavefront_obj/importer/obj_import_file_reader.hh
+++ b/source/blender/io/wavefront_obj/importer/obj_import_file_reader.hh
@@ -9,7 +9,7 @@
 #pragma once
 
 #include "BLI_fileops.hh"
-#include "IO_wavefront_obj.h"
+#include "IO_wavefront_obj.hh"
 #include "obj_import_mtl.hh"
 #include "obj_import_objects.hh"
 
diff --git a/source/blender/io/wavefront_obj/importer/obj_import_mesh.cc b/source/blender/io/wavefront_obj/importer/obj_import_mesh.cc
index 6a940c9c0f4..737f5ba5b0c 100644
--- a/source/blender/io/wavefront_obj/importer/obj_import_mesh.cc
+++ b/source/blender/io/wavefront_obj/importer/obj_import_mesh.cc
@@ -22,7 +22,7 @@
 #include "BLI_math_vector.h"
 #include "BLI_set.hh"
 
-#include "IO_wavefront_obj.h"
+#include "IO_wavefront_obj.hh"
 #include "importer_mesh_utils.hh"
 #include "obj_export_mtl.hh"
 #include "obj_import_mesh.hh"
diff --git a/source/blender/io/wavefront_obj/importer/obj_importer.hh b/source/blender/io/wavefront_obj/importer/obj_importer.hh
index 9e4bdb92a08..34e9e2896d3 100644
--- a/source/blender/io/wavefront_obj/importer/obj_importer.hh
+++ b/source/blender/io/wavefront_obj/importer/obj_importer.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "IO_wavefront_obj.h"
+#include "IO_wavefront_obj.hh"
 
 namespace blender::io::obj {
 
diff --git a/source/blender/io/wavefront_obj/tests/obj_exporter_tests.hh b/source/blender/io/wavefront_obj/tests/obj_exporter_tests.hh
index 514b711d5fa..e0fb18ba860 100644
--- a/source/blender/io/wavefront_obj/tests/obj_exporter_tests.hh
+++ b/source/blender/io/wavefront_obj/tests/obj_exporter_tests.hh
@@ -4,7 +4,7 @@
 
 #pragma once
 
-#include "IO_wavefront_obj.h"
+#include "IO_wavefront_obj.hh"
 
 namespace blender::io::obj {