diff --git a/lib/import/otrs.rb b/lib/import/otrs.rb
index d655deda2..fa66476f7 100644
--- a/lib/import/otrs.rb
+++ b/lib/import/otrs.rb
@@ -304,7 +304,7 @@ module Import::OTRS
 
     result = request_json({})
     if !result['Success']
-      'API key not valid!'
+      fail 'API key not valid!'
     end
 
     # set settings