diff --git a/lib/cartodb/signed_maps.js b/lib/cartodb/signed_maps.js
index d8014f1a..6931337f 100644
--- a/lib/cartodb/signed_maps.js
+++ b/lib/cartodb/signed_maps.js
@@ -2,7 +2,7 @@ var crypto    = require('crypto');
 var Step      = require('step');
 var _         = require('underscore');
 
-var debug = global.environment.debug;
+var debug = global.environment ? global.environment.debug : undefined;
 
 // Class handling map signatures and user certificates
 //