diff --git a/gtk2_ardour/plugin_ui.cc b/gtk2_ardour/plugin_ui.cc
index 65b1e82cdc..b13f3683fb 100644
--- a/gtk2_ardour/plugin_ui.cc
+++ b/gtk2_ardour/plugin_ui.cc
@@ -582,7 +582,6 @@ PlugUIBase::PlugUIBase (boost::shared_ptr<PluginInsert> pi)
 	_bypass_button.set_icon (ArdourIcon::PluginBypass);
 	_bypass_button.set_active (!pi->enabled ());
 	_bypass_button.signal_button_release_event().connect (sigc::mem_fun(*this, &PlugUIBase::bypass_button_release), false);
-	_focus_button.add_events (Gdk::ENTER_NOTIFY_MASK|Gdk::LEAVE_NOTIFY_MASK);
 
 	_focus_button.signal_button_release_event().connect (sigc::mem_fun(*this, &PlugUIBase::focus_toggled));
 	_focus_button.add_events (Gdk::ENTER_NOTIFY_MASK|Gdk::LEAVE_NOTIFY_MASK);