diff --git a/fpdfsdk/javascript/cjs_scalewhen.h b/fpdfsdk/javascript/cjs_scalewhen.h
index 50a723b..ec296d4 100644
--- a/fpdfsdk/javascript/cjs_scalewhen.h
+++ b/fpdfsdk/javascript/cjs_scalewhen.h
@@ -11,7 +11,7 @@
 
 class CJS_ScaleWhen : public CJS_Object {
  public:
-  static void DefineJSObjects(CFXJS_Engine* pEngine, FXJSOBJTYPE eObjType);
+  static void DefineJSObjects(CFXJS_Engine* pEngine);
 
   explicit CJS_ScaleWhen(v8::Local<v8::Object> pObject) : CJS_Object(pObject) {}
   ~CJS_ScaleWhen() override {}