diff --git a/native_mate/constructor.h b/native_mate/constructor.h
index 16cec447d2a7..3d2ed69c0eab 100644
--- a/native_mate/constructor.h
+++ b/native_mate/constructor.h
@@ -159,6 +159,8 @@ class Constructor {
     Wrappable* object = internal::InvokeFactory(args, factory);
     if (object)
       object->Wrap(isolate, args->GetThis());
+    else
+      args->ThrowError();
 
     MATE_METHOD_RETURN_UNDEFINED();
   }
diff --git a/native_mate/constructor.h.pump b/native_mate/constructor.h.pump
index 81a7524087e6..a0ef452fde0f 100644
--- a/native_mate/constructor.h.pump
+++ b/native_mate/constructor.h.pump
@@ -87,6 +87,11 @@ class Constructor {
  private:
   static MATE_METHOD_RETURN_TYPE New(const WrappableFactoryFunction& factory,
                                      v8::Isolate* isolate, Arguments* args) {
+    if (!args->IsConstructCall()) {
+      args->ThrowError("Requires constructor call");
+      MATE_METHOD_RETURN_UNDEFINED();
+    }
+
     Wrappable* object = internal::InvokeFactory(args, factory);
     if (object)
       object->Wrap(isolate, args->GetThis());