diff --git a/src/api-arguments.cc b/src/api-arguments.cc
index c4b698c..71a0f60 100644
--- a/src/api-arguments.cc
+++ b/src/api-arguments.cc
@@ -9,10 +9,10 @@
 
 Handle<Object> FunctionCallbackArguments::Call(FunctionCallback f) {
   Isolate* isolate = this->isolate();
+  RuntimeCallTimerScope timer(isolate, &RuntimeCallStats::FunctionCallback);
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, FUNCTION_ADDR(f));
-  FunctionCallbackInfo<v8::Value> info(begin(), argv_, argc_,
-                                       is_construct_call_);
+  FunctionCallbackInfo<v8::Value> info(begin(), argv_, argc_);
   f(info);
   return GetReturnValue<Object>(isolate);
 }
@@ -20,6 +20,7 @@
 Handle<JSObject> PropertyCallbackArguments::Call(
     IndexedPropertyEnumeratorCallback f) {
   Isolate* isolate = this->isolate();
+  RuntimeCallTimerScope timer(isolate, &RuntimeCallStats::PropertyCallback);
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, FUNCTION_ADDR(f));
   PropertyCallbackInfo<v8::Array> info(begin());