diff --git a/src/async_wrap.cc b/src/async_wrap.cc
index 3f77169321a919..71599eecbda127 100644
--- a/src/async_wrap.cc
+++ b/src/async_wrap.cc
@@ -342,8 +342,7 @@ static void PromiseHook(PromiseHookType type, Local<Promise> promise,
 static void SetupHooks(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
 
-  if (!args[0]->IsObject())
-    return env->ThrowTypeError("first argument must be an object");
+  CHECK(args[0]->IsObject());
 
   // All of init, before, after, destroy are supplied by async_hooks
   // internally, so this should every only be called once. At which time all