diff --git a/gtk2_ardour/ardour.keys.in b/gtk2_ardour/ardour.keys.in
index e3e0ca9109..66e27ec353 100644
--- a/gtk2_ardour/ardour.keys.in
+++ b/gtk2_ardour/ardour.keys.in
@@ -113,7 +113,7 @@ This mode provides many different operations on both regions and control points,
 
 @vis|Editor/expand-tracks|                                 <@SECONDARY@>equal|expand track height
 @vis|Editor/shrink-tracks|                                 <@SECONDARY@>minus|shrink track height
-@vis|Editor/zoom-to-session|                          <@SECONDARY@>underscore|zoom to session
+@vis|Editor/zoom-to-session|                          <@PRIMARY@><@TERTIARY@>underscore|zoom to session
 
 @eep|Editor/edit-cursor-to-previous-region-sync|                   apostrophe|EP to prev region sync
 @eep|Editor/edit-cursor-to-next-region-sync|                        semicolon|EP to next region sync