diff --git a/gtk2_ardour/gain_meter.cc b/gtk2_ardour/gain_meter.cc
index 27a833ab4a..50592c7757 100644
--- a/gtk2_ardour/gain_meter.cc
+++ b/gtk2_ardour/gain_meter.cc
@@ -1120,7 +1120,7 @@ GainMeterBase::get_controllable()
 bool
 GainMeterBase::level_meter_button_press (GdkEventButton* ev)
 {
-	return !!LevelMeterButtonPress (ev); /* EMIT SIGNAL */
+	return static_cast<bool>(LevelMeterButtonPress (ev)); /* EMIT SIGNAL */
 }
 
 void
diff --git a/gtk2_ardour/level_meter.cc b/gtk2_ardour/level_meter.cc
index 509513da92..4d77b3a61d 100644
--- a/gtk2_ardour/level_meter.cc
+++ b/gtk2_ardour/level_meter.cc
@@ -455,7 +455,7 @@ LevelMeterBase::set_type(MeterType t)
 bool
 LevelMeterBase::meter_button_press (GdkEventButton* ev)
 {
-	return !!ButtonPress (ev); /* EMIT SIGNAL */
+	return static_cast<bool>(ButtonPress (ev)); /* EMIT SIGNAL */
 }
 
 bool