diff --git a/lib/cartodb/server_options.js b/lib/cartodb/server_options.js
index 518fab15..6ff68e82 100644
--- a/lib/cartodb/server_options.js
+++ b/lib/cartodb/server_options.js
@@ -9,7 +9,7 @@ var   _          = require('underscore')
   ;
 
 // This is for backward compatibility with 1.3.3
-if ( ! global.environment.sqlapi.domain ) {
+if ( _.isUndefined(global.environment.sqlapi.domain) ) {
   global.environment.sqlapi.domain = global.environment.sqlapi.host;
 }