diff --git a/app/assets/javascripts/editor/editor.js.erb b/app/assets/javascripts/editor/editor.js.erb
index 5633ce4e..c5f8a56b 100644
--- a/app/assets/javascripts/editor/editor.js.erb
+++ b/app/assets/javascripts/editor/editor.js.erb
@@ -1,7 +1,7 @@
 var CodeOceanEditor = {
   //ACE-Editor-Path
   // ruby part adds the relative_url_root, if it is set.
-  ACE_FILES_PATH: '<%= (defined? config.relative_url_root) && config.relative_url_root != nil && config.relative_url_root != "" ? config.relative_url_root : "" %>' + '/assets/ace/',
+  ACE_FILES_PATH: '<%= (defined? Rails.application.config.relative_url_root) && Rails.application.config.relative_url_root != nil && Rails.application.config.relative_url_root != "" ? Rails.application.config.relative_url_root : "" %>' + '/assets/ace/',
   THEME: 'ace/theme/textmate',
 
   //Color-Encoding for Percentages in Progress Bars (For submissions)