1 files changed, 4 insertions, 0 deletions
diff --git a/include/qom/object.h b/include/qom/object.h
index 63e2a404da..23fc048088 100644
--- a/include/qom/object.h
+++ b/include/qom/object.h
@@ -344,6 +344,8 @@ typedef void (ObjectUnparent)(Object *obj);
  */
 typedef void (ObjectFree)(void *obj);
 
+#define OBJECT_CLASS_CAST_CACHE 4
+
 /**
  * ObjectClass:
  *
@@ -356,6 +358,8 @@ struct ObjectClass
     Type type;
     GSList *interfaces;
 
+    const char *cast_cache[OBJECT_CLASS_CAST_CACHE];
+
     ObjectUnparent *unparent;
 };