diff --git a/ext/mixed/js/hotkey-handler.js b/ext/mixed/js/hotkey-handler.js
index 01c33f5d..ef04ea0d 100644
--- a/ext/mixed/js/hotkey-handler.js
+++ b/ext/mixed/js/hotkey-handler.js
@@ -86,6 +86,7 @@ class HotkeyHandler extends EventDispatcher {
         for (const {action, key, modifiers, scopes, enabled} of hotkeys) {
             if (
                 enabled &&
+                key !== null &&
                 action !== '' &&
                 scopes.includes(this._scope)
             ) {