diff --git a/gtk2_ardour/vst_plugin_ui.cc b/gtk2_ardour/vst_plugin_ui.cc
index a2ce3413ec..4416a354cb 100644
--- a/gtk2_ardour/vst_plugin_ui.cc
+++ b/gtk2_ardour/vst_plugin_ui.cc
@@ -234,8 +234,10 @@ VSTPluginUI::dispatch_effeditkey (GdkEventKey* gdk_key)
 			special_key = 15;
 			break;
 		case GDK_Page_Down:
+			/* fallthrough */
 		case GDK_KP_Page_Down:
 			special_key = 16;
+			break;
 		case GDK_Insert:
 			special_key = 21;
 			break;