diff --git a/libs/ardour/mute_control.cc b/libs/ardour/mute_control.cc
index 11b4f32913..e14ba36e87 100644
--- a/libs/ardour/mute_control.cc
+++ b/libs/ardour/mute_control.cc
@@ -85,7 +85,7 @@ MuteControl::actually_set_value (double val, Controllable::GroupControlDispositi
 		_muteable.act_on_mute ();
 	}
 
-	AutomationControl::actually_set_value (val, gcd);
+	SlavableAutomationControl::actually_set_value (val, gcd);
 }
 
 void