2 files changed, 3 insertions, 1 deletions
diff --git a/libs/ardour/ardour/panner.h b/libs/ardour/ardour/panner.h
index 640a35080d..b239395fd4 100644
--- a/libs/ardour/ardour/panner.h
+++ b/libs/ardour/ardour/panner.h
@@ -267,7 +267,7 @@ public:
 	StreamPanner &streampanner( uint32_t n ) const { assert( n < _streampanners.size() ); return *_streampanners[n]; }
 	uint32_t npanners() const { return _streampanners.size(); }
 
-	PBD::Signal0<void> Changed;
+	PBD::Signal0<void> Changed; /* panner and/or outputs count changed */
 	PBD::Signal0<void> LinkStateChanged;
 	PBD::Signal0<void> StateChanged; /* for bypass */
 
diff --git a/libs/ardour/panner.cc b/libs/ardour/panner.cc
index 30931ef0a1..b6decc281f 100644
--- a/libs/ardour/panner.cc
+++ b/libs/ardour/panner.cc
@@ -148,6 +148,7 @@ StreamPanner::set_position (float xpos, float ypos, bool link_call)
 		_y = ypos;
 		update ();
 		Changed ();
+		_control->Changed ();
 	}
 }
 
@@ -164,6 +165,7 @@ StreamPanner::set_position (float xpos, float ypos, float zpos, bool link_call)
 		_z = zpos;
 		update ();
 		Changed ();
+		_control->Changed ();
 	}
 }