1 files changed, 1 insertions, 1 deletions
diff --git a/intern/cycles/blender/blender_id_map.h b/intern/cycles/blender/blender_id_map.h
index 3bc42e349ae..b5f6aaa67a8 100644
--- a/intern/cycles/blender/blender_id_map.h
+++ b/intern/cycles/blender/blender_id_map.h
@@ -200,7 +200,7 @@ template<typename K, typename T> class id_map {
  * To uniquely identify instances, we use the parent, object and persistent instance ID.
  * We also export separate object for a mesh and its particle hair. */
 
-enum { OBJECT_PERSISTENT_ID_SIZE = 16 };
+enum { OBJECT_PERSISTENT_ID_SIZE = 8 /* MAX_DUPLI_RECUR in Blender. */ };
 
 struct ObjectKey {
   void *parent;