diff --git a/source/blender/editors/object/object_edit.c b/source/blender/editors/object/object_edit.c
index 0acdc8b61fe..93da3592275 100644
--- a/source/blender/editors/object/object_edit.c
+++ b/source/blender/editors/object/object_edit.c
@@ -587,7 +587,7 @@ void OBJECT_OT_posemode_toggle(wmOperatorType *ot)
 	ot->poll= ED_operator_object_active_editable;
 	
 	/* flag */
-	ot->flag= OPTYPE_REGISTER;
+	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 }
 
 /* *********************** */