1 files changed, 2 insertions, 2 deletions
diff --git a/libs/ardour/monitor_processor.cc b/libs/ardour/monitor_processor.cc
index c7a79ee2f5..e5c58009af 100644
--- a/libs/ardour/monitor_processor.cc
+++ b/libs/ardour/monitor_processor.cc
@@ -37,11 +37,11 @@ using namespace std;
 /* specialize for bool because of set_value() semantics */
 
 namespace ARDOUR {
-	template<> void MPControl<bool>::set_value (double v, PBD::Controllable::GroupControlDisposition /*group_override*/) {
+	template<> void MPControl<bool>::set_value (double v, PBD::Controllable::GroupControlDisposition gcd) {
                 bool newval = fabs (v) >= 0.5;
                 if (newval != _value) {
                         _value = newval;
-                        Changed(); /* EMIT SIGNAL */
+                        Changed (true, gcd); /* EMIT SIGNAL */
                 }
         }
 }