diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index 02f6fdeb5b..4ab9fc605b 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -853,6 +853,7 @@ class LIBARDOUR_API Session : public PBD::StatefulDestructible, public PBD::Scop
 
 	PBD::Signal1<void,bool> SoloActive;
 	PBD::Signal0<void> SoloChanged;
+	PBD::Signal0<void> MuteChanged;
 	PBD::Signal0<void> IsolatedChanged;
 	PBD::Signal0<void> MonitorChanged;
 
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index d54dac7fd9..12fb6521fa 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -3848,6 +3848,7 @@ Session::remove_route (boost::shared_ptr<Route> route)
 void
 Session::route_mute_changed ()
 {
+	MuteChanged (); /* EMIT SIGNAL */
 	set_dirty ();
 }