diff --git a/src/browser/components/preferences/zen-settings.js b/src/browser/components/preferences/zen-settings.js
index 2d6bef1a8..288b342d6 100644
--- a/src/browser/components/preferences/zen-settings.js
+++ b/src/browser/components/preferences/zen-settings.js
@@ -825,6 +825,7 @@ var zenIgnoreKeyboardShortcutIDs = [
   "key_enterFullScreen_compat",
   "key_exitFullScreen_old",
   "key_exitFullScreen_compat",
+  "key_duplicateTab",
 ];
 
 var zenIgnoreKeyboardShortcutL10n = [