diff --git a/gtk2_ardour/vst3_x11_plugin_ui.cc b/gtk2_ardour/vst3_x11_plugin_ui.cc
index 8b1003f1d0..1eac08f52c 100644
--- a/gtk2_ardour/vst3_x11_plugin_ui.cc
+++ b/gtk2_ardour/vst3_x11_plugin_ui.cc
@@ -117,8 +117,6 @@ public:
 			return kInvalidArgument;
 		}
 
-		std::vector<boost::unordered_map<FileDescriptor, EventHandler>::iterator> to_erase;
-
 		tresult rv = false;
 
 		Glib::Threads::Mutex::Lock lm (_lock);