diff --git a/source/blender/editors/sculpt_paint/sculpt_undo.cc b/source/blender/editors/sculpt_paint/sculpt_undo.cc
index db320ee3a2d..5b4f6efd874 100644
--- a/source/blender/editors/sculpt_paint/sculpt_undo.cc
+++ b/source/blender/editors/sculpt_paint/sculpt_undo.cc
@@ -576,6 +576,10 @@ static bool sculpt_undo_restore_mask(bContext *C, SculptUndoNode *unode, bool *m
     /* Regular mesh restore. */
     float *vmask = static_cast<float *>(
         CustomData_get_layer_for_write(&mesh->vert_data, CD_PAINT_MASK, mesh->totvert));
+    if (!vmask) {
+      vmask = static_cast<float *>(
+          CustomData_add_layer(&mesh->vert_data, CD_PAINT_MASK, CD_SET_DEFAULT, mesh->totvert));
+    }
     ss->vmask = vmask;
 
     index = unode->index;