diff --git a/Zend/zend.h b/Zend/zend.h
index 163b48015d9..2155be43c12 100644
--- a/Zend/zend.h
+++ b/Zend/zend.h
@@ -152,7 +152,7 @@ struct _zend_class_entry {
 		zend_class_entry *parent;
 		zend_string *parent_name;
 	};
-	int refcount;
+	uint32_t refcount;
 	uint32_t ce_flags;
 	uint32_t ce_flags2;