diff --git a/source/blender/blenkernel/BKE_lib_id.h b/source/blender/blenkernel/BKE_lib_id.h
index 889988cc7d9..a393d4f4f98 100644
--- a/source/blender/blenkernel/BKE_lib_id.h
+++ b/source/blender/blenkernel/BKE_lib_id.h
@@ -32,6 +32,8 @@
 #include "BLI_compiler_attrs.h"
 #include "BLI_utildefines.h"
 
+#include "DNA_userdef_enums.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -448,7 +450,7 @@ struct ID *BKE_id_copy(struct Main *bmain, const struct ID *id);
  */
 struct ID *BKE_id_copy_for_duplicate(struct Main *bmain,
                                      struct ID *id,
-                                     uint duplicate_flags,
+                                     eDupli_ID_Flags duplicate_flags,
                                      int copy_flags);
 
 /**
diff --git a/source/blender/blenkernel/BKE_object.h b/source/blender/blenkernel/BKE_object.h
index 92ea5bd4986..960b0419029 100644
--- a/source/blender/blenkernel/BKE_object.h
+++ b/source/blender/blenkernel/BKE_object.h
@@ -11,6 +11,7 @@
 #include "BLI_sys_types.h"
 
 #include "DNA_object_enums.h"
+#include "DNA_userdef_enums.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -234,7 +235,7 @@ bool BKE_object_obdata_is_libdata(const struct Object *ob);
  */
 struct Object *BKE_object_duplicate(struct Main *bmain,
                                     struct Object *ob,
-                                    uint dupflag,
+                                    eDupli_ID_Flags dupflag,
                                     uint duplicate_options);
 
 /**
diff --git a/source/blender/blenkernel/intern/object.cc b/source/blender/blenkernel/intern/object.cc
index c05722ceda9..11fbdd5add7 100644
--- a/source/blender/blenkernel/intern/object.cc
+++ b/source/blender/blenkernel/intern/object.cc
@@ -2718,7 +2718,10 @@ void BKE_object_transform_copy(Object *ob_tar, const Object *ob_src)
   copy_v3_v3(ob_tar->scale, ob_src->scale);
 }
 
-Object *BKE_object_duplicate(Main *bmain, Object *ob, uint dupflag, uint duplicate_options)
+Object *BKE_object_duplicate(Main *bmain,
+                             Object *ob,
+                             eDupli_ID_Flags dupflag,
+                             uint duplicate_options)
 {
   const bool is_subprocess = (duplicate_options & LIB_ID_DUPLICATE_IS_SUBPROCESS) != 0;
   const bool is_root_id = (duplicate_options & LIB_ID_DUPLICATE_IS_ROOT_ID) != 0;
diff --git a/source/blender/makesdna/DNA_userdef_enums.h b/source/blender/makesdna/DNA_userdef_enums.h
index dc368819ab0..44fbdff38db 100644
--- a/source/blender/makesdna/DNA_userdef_enums.h
+++ b/source/blender/makesdna/DNA_userdef_enums.h
@@ -6,6 +6,8 @@
 
 #pragma once
 
+#include "BLI_utildefines.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -50,6 +52,7 @@ typedef enum eDupli_ID_Flags {
   /* Duplicate (and hence make local) linked data. */
   USER_DUP_LINKED_ID = (1 << 30),
 } eDupli_ID_Flags;
+ENUM_OPERATORS(eDupli_ID_Flags, USER_DUP_LINKED_ID)
 
 #ifdef __cplusplus
 }