diff --git a/dev/js/src/loc/de.js b/dev/js/src/loc/de.js
index 41614fd..160350f 100644
--- a/dev/js/src/loc/de.js
+++ b/dev/js/src/loc/de.js
@@ -1,7 +1,13 @@
 "use strict";
 
+window.KorAP = window.KorAP || {};
+
 define(function () {
   const loc = KorAP.Locale;
+
+  if (loc == undefined)
+    return;
+  
   loc.OR = 'oder';
   loc.AND = 'und';
   // EMPTY, DELETE
diff --git a/dev/js/src/loc/dereko.js b/dev/js/src/loc/dereko.js
index 87b99d4..718591e 100644
--- a/dev/js/src/loc/dereko.js
+++ b/dev/js/src/loc/dereko.js
@@ -6,9 +6,14 @@
 
 "use strict";
 
+window.KorAP = window.KorAP || {};
+
 define(function () {
   const loc = KorAP.Locale;
 
+  if (loc == undefined)
+    return;
+
   //Query example for guided tour
   if (loc.TOUR_Qexample == undefined)
     loc.TOUR_Qexample = "laufen";