diff --git a/runtime/builtins.cpp b/runtime/builtins.cpp
index 845cefa3bd1fa9c53ad8d18e2fd5bf32b1423aff..8185b3f3b1e8b27c0178c5575a9a908d8b753d99 100644
--- a/runtime/builtins.cpp
+++ b/runtime/builtins.cpp
@@ -2347,7 +2347,7 @@ JSHandle<JSObject> Builtins::InitializeRuntimeTesting(const JSHandle<GlobalEnv>
 #ifdef FUZZING_FUZZILLI_BUILTIN
 void Builtins::InitializeFuzzilli(const JSHandle<GlobalEnv> &env, const JSHandle<JSHClass> &objFuncDynclass)
 {
-    class BuiltinsFuzzilli : {
+    class BuiltinsFuzzilli {
     public:
         static JSTaggedValue FuzzilliConstructor(EcmaRuntimeCallInfo *argv)
         {