diff --git a/quickjs.c b/quickjs.c
index 2a7f3e0..2423d40 100644
--- a/quickjs.c
+++ b/quickjs.c
@@ -4943,7 +4943,7 @@ static int JS_SetObjectData(JSContext *ctx, JSValueConst obj, JSValue val)
     return -1;
 }
 
-JSValue JS_NewObjectClass(JSContext *ctx, int class_id)
+JSValue JS_NewObjectClass(JSContext *ctx, JSClassID class_id)
 {
     return JS_NewObjectProtoClass(ctx, ctx->class_proto[class_id], class_id);
 }