1 files changed, 5 insertions, 0 deletions
diff --git a/source/blender/blenkernel/BKE_main.h b/source/blender/blenkernel/BKE_main.h
index a263162e013..8aac09d8738 100644
--- a/source/blender/blenkernel/BKE_main.h
+++ b/source/blender/blenkernel/BKE_main.h
@@ -99,6 +99,11 @@ typedef struct Main {
    * use "needs_flush_to_id" in edit data to flag data which needs updating.
    */
   char is_memfile_undo_flush_needed;
+  /**
+   * Indicates that next memfile undo step should not allow to re-use old bmain when re-read, but
+   * instead do a complete full re-read/update from stored memfile.
+   */
+  char use_memfile_full_barrier;
 
   BlendThumbnail *blen_thumb;