diff --git a/gtk2_ardour/enums.cc b/gtk2_ardour/enums.cc
index 94f116b76e..b454dc82f7 100644
--- a/gtk2_ardour/enums.cc
+++ b/gtk2_ardour/enums.cc
@@ -188,6 +188,7 @@ setup_gtk_ardour_enums ()
 	REGISTER_ENUM (BBTRulerItem);
 	REGISTER_ENUM (SamplesRulerItem);
 	REGISTER_ENUM (VelocityItem);
+	REGISTER_ENUM (VelocityBaseItem);
 	REGISTER_ENUM (ClipStartItem);
 	REGISTER_ENUM (ClipEndItem);
 	REGISTER (item_type);