diff --git a/src/tkc/object.h b/src/tkc/object.h
index 8a7fb47d94..dda127eea2 100644
--- a/src/tkc/object.h
+++ b/src/tkc/object.h
@@ -85,8 +85,8 @@ struct _tk_object_t {
   char* name;
 
   /*private*/
-  uint32_t visiting : 1;
   const object_vtable_t* vt;
+  uint32_t visiting;
 };
 
 /**