1 files changed, 7 insertions, 0 deletions
diff --git a/source/blender/blenkernel/BKE_paint.h b/source/blender/blenkernel/BKE_paint.h
index 4413ad2a70f..48f9e1fd95e 100644
--- a/source/blender/blenkernel/BKE_paint.h
+++ b/source/blender/blenkernel/BKE_paint.h
@@ -306,6 +306,13 @@ typedef struct SculptSession {
 
   /* This flag prevents PBVH from being freed when creating the vp_handle for texture paint. */
   bool building_vp_handle;
+
+  /**
+   * ID data is older than sculpt-mode data.
+   * Set #Main.is_memfile_undo_flush_needed when enabling.
+   */
+  char needs_flush_to_id;
+
 } SculptSession;
 
 void BKE_sculptsession_free(struct Object *ob);