diff --git a/gtk2_ardour/waves_dialog.cc b/gtk2_ardour/waves_dialog.cc
index e9f331bcd8..d120bf7393 100644
--- a/gtk2_ardour/waves_dialog.cc
+++ b/gtk2_ardour/waves_dialog.cc
@@ -120,6 +120,7 @@ WavesDialog::on_key_press_event (GdkEventKey* ev)
     switch (ev->keyval)
     {
         case GDK_Return:
+        case GDK_KP_Enter:
             hide ();
             response (WavesDialog::RESPONSE_DEFAULT);
             return true;