diff --git a/source/blender/src/editobject.c b/source/blender/src/editobject.c
index 8f3d9779a0d..1bf3fe7ea72 100644
--- a/source/blender/src/editobject.c
+++ b/source/blender/src/editobject.c
@@ -2880,10 +2880,12 @@ void flip_subdivison(int level)
 	for(base= G.scene->base.first; base; base= base->next) {
 		if(((level==-1) && (TESTBASE(base))) || (TESTBASELIB(base))) {
 			object_flip_subdivison(base->object, &set, level, mode);
+			
 			if(base->object->dup_group) {
 				GroupObject *go;
 				for(go= base->object->dup_group->gobject.first; go; go= go->next)
-					object_flip_subdivison(go->ob, &set, level, mode);
+					if( modifiers_findByType(go->ob, eModifierType_Subsurf))	/* only when exists */
+						object_flip_subdivison(go->ob, &set, level, mode);
 			}
 		}
 	}