diff --git a/src/browser/components/preferences/zen-settings.js b/src/browser/components/preferences/zen-settings.js
index c9a4abd5..1579b56f 100644
--- a/src/browser/components/preferences/zen-settings.js
+++ b/src/browser/components/preferences/zen-settings.js
@@ -987,7 +987,7 @@ var gZenCKSSettings = {
     let input = document.querySelector(
       `.${ZEN_CKS_INPUT_FIELD_CLASS}[${KEYBIND_ATTRIBUTE_KEY}="${this._currentActionID}"]`
     );
-    const modifiers = new KeyShortcutModifiers(
+    const modifiers = new nsKeyShortcutModifiers(
       event.ctrlKey,
       event.altKey,
       event.shiftKey,