diff --git a/libs/pbd/enums.cc b/libs/pbd/enums.cc
index b5b9bc1676..afa156bb1e 100644
--- a/libs/pbd/enums.cc
+++ b/libs/pbd/enums.cc
@@ -39,6 +39,8 @@ setup_libpbd_enums ()
 
 	REGISTER_CLASS_ENUM (Controllable, Toggle);
 	REGISTER_CLASS_ENUM (Controllable, GainLike);
+	REGISTER_CLASS_ENUM (Controllable, RealTime);
+	REGISTER_CLASS_ENUM (Controllable, NotAutomatable);
 	REGISTER (controllable_flags);
 
 	REGISTER_CLASS_ENUM (Controllable, InverseGroup);