diff --git a/libs/gtkmm2ext/barcontroller.cc b/libs/gtkmm2ext/barcontroller.cc
index 5e715c6a28..6c4c59e12e 100644
--- a/libs/gtkmm2ext/barcontroller.cc
+++ b/libs/gtkmm2ext/barcontroller.cc
@@ -153,7 +153,7 @@ void
 BarController::before_expose ()
 {
 	double xpos = -1;
-	_slider.set_text (get_label (xpos), false);
+	_slider.set_text (get_label (xpos), false, false);
 }
 
 void