diff --git a/libs/ardour/luabindings.cc b/libs/ardour/luabindings.cc
index ac5353da1c..e775109213 100644
--- a/libs/ardour/luabindings.cc
+++ b/libs/ardour/luabindings.cc
@@ -199,7 +199,6 @@ CLASSKEYS(ARDOUR::RouteGroup);
 CLASSKEYS(ARDOUR::ParameterDescriptor);
 CLASSKEYS(ARDOUR::PeakMeter);
 CLASSKEYS(ARDOUR::PluginInfo);
-CLASSKEYS(ARDOUR::PluginInfo);
 CLASSKEYS(ARDOUR::Plugin::PresetRecord);
 CLASSKEYS(ARDOUR::PortEngine);
 CLASSKEYS(ARDOUR::PortManager);