diff --git a/ext/opcache/zend_file_cache.c b/ext/opcache/zend_file_cache.c
index bcee38079b353..7b4b4cbb12112 100644
--- a/ext/opcache/zend_file_cache.c
+++ b/ext/opcache/zend_file_cache.c
@@ -867,6 +867,8 @@ static void zend_file_cache_serialize_class(zval                     *zv,
 
 	ZEND_MAP_PTR_INIT(ce->static_members_table, NULL);
 	ZEND_MAP_PTR_INIT(ce->mutable_data, NULL);
+
+	ce->inheritance_cache = NULL;
 }
 
 static void zend_file_cache_serialize_warnings(