diff --git a/gtk2_ardour/ardour.menus.in b/gtk2_ardour/ardour.menus.in
index fde3ea5676..f73b0ca335 100644
--- a/gtk2_ardour/ardour.menus.in
+++ b/gtk2_ardour/ardour.menus.in
@@ -528,7 +528,6 @@
         <menuitem action="toggle-samples-ruler"/>
         <menuitem action="toggle-bbt-ruler"/>
         <separator/>
-        <menuitem action="toggle-mapping-ruler"/>
         <menuitem action="toggle-meter-ruler"/>
         <menuitem action="toggle-tempo-ruler"/>
         <menuitem action="toggle-range-ruler"/>