diff --git a/libs/ardour/enums.cc b/libs/ardour/enums.cc
index a9010583ec..cd1a120c92 100644
--- a/libs/ardour/enums.cc
+++ b/libs/ardour/enums.cc
@@ -380,8 +380,11 @@ setup_enum_writer ()
 
 	REGISTER_ENUM (AudioUnit);
 	REGISTER_ENUM (LADSPA);
+	REGISTER_ENUM (LV2);
 	REGISTER_ENUM (Windows_VST);
 	REGISTER_ENUM (LXVST);
+	REGISTER_ENUM (MacVST);
+	REGISTER_ENUM (Lua);
 	REGISTER (_PluginType);
 
 	REGISTER_ENUM (MTC);