diff --git a/gtk2_ardour/mnemonic-us.bindings.in b/gtk2_ardour/mnemonic-us.bindings.in
index d0bc802b0e..aff175857c 100644
--- a/gtk2_ardour/mnemonic-us.bindings.in
+++ b/gtk2_ardour/mnemonic-us.bindings.in
@@ -189,7 +189,6 @@ This mode provides many different operations on both regions and control points,
 @trans|Editor/toggle-follow-playhead|<@PRIMARY@>f|toggle playhead tracking
 @trans|Transport/ToggleFollowEdits|<@TERTIARY@>f|toggle playhead follows edits
 @wvis|Common/ToggleMaximalEditor|<@PRIMARY@><@SECONDARY@>f|maximise editor space
-@wvis|Common/ToggleMaximalMixer|F12|maximise mixer space
 @wvis|Region/show-rhythm-ferret|<@WINDOW@>f|show rhythm ferret window 
 @mmode|MouseMode/set-mouse-mode-gain|g|region gain mode
 @epp|Region/play-selected-regions|h|play selected region(s)