diff --git a/gtk2_ardour/ardour.keys.in b/gtk2_ardour/ardour.keys.in
index 9bef940ae0..611d008bcd 100644
--- a/gtk2_ardour/ardour.keys.in
+++ b/gtk2_ardour/ardour.keys.in
@@ -172,6 +172,7 @@ This mode provides many different operations on both regions and control points,
 @trans|Transport/Record|                                   <@TERTIARY@>r|engage record
 @mmode|MouseMode/set-mouse-mode-timefx|                                t|timefx mode
 @gselect|Common/select-all-visible-lanes|                   <@PRIMARY@>t|select all visible lanes
+@mmode|MouseMode/set-mouse-mode-grid|                                  y|grid mode
 @edit|Editor/alternate-redo|                                <@PRIMARY@>y|redo
 @select|Editor/select-all-between-cursors|                  <@PRIMARY@>u|select all regions enclosed by Range
 @select|Editor/select-all-within-cursors|                              u|select all regions touched by Range