diff --git a/libs/ardour/luabindings.cc b/libs/ardour/luabindings.cc
index 54c316495e..fc3aca799b 100644
--- a/libs/ardour/luabindings.cc
+++ b/libs/ardour/luabindings.cc
@@ -294,6 +294,8 @@ CLASSKEYS(boost::weak_ptr<ARDOUR::Bundle>);
 CLASSKEYS(boost::weak_ptr<ARDOUR::Route>);
 CLASSKEYS(boost::weak_ptr<ARDOUR::VCA>);
 
+CLASSKEYS(boost::shared_ptr<ARDOUR::RegionList>);
+
 CLASSKEYS(Vamp::RealTime);
 CLASSKEYS(Vamp::PluginBase);
 CLASSKEYS(Vamp::PluginBase::ParameterDescriptor);