diff --git a/gtk2_ardour/ui/editor_mixer.xml b/gtk2_ardour/ui/editor_mixer.xml
index d5e47d9ad4..468fffd93a 100644
--- a/gtk2_ardour/ui/editor_mixer.xml
+++ b/gtk2_ardour/ui/editor_mixer.xml
@@ -142,18 +142,18 @@
+ text="In"
+ winfont="Arial Bold 9"
+ macfont="Helvetica Bold 9"/>
+ text="Out"
+ winfont="Arial Bold 9"
+ macfont="Helvetica Bold 9"/>