diff --git a/lib/cartodb/middleware/context/layergroup-token.js b/lib/cartodb/middleware/context/layergroup-token.js
index 53587c8d..af213bf5 100644
--- a/lib/cartodb/middleware/context/layergroup-token.js
+++ b/lib/cartodb/middleware/context/layergroup-token.js
@@ -14,9 +14,7 @@ module.exports = function layergroupToken () {
 
         if (layergroupToken.signer) {
             res.locals.signer = layergroupToken.signer;
-            if (!res.locals.signer) {
-                res.locals.signer = user;
-            } else if (res.locals.signer !== user) {
+            if (res.locals.signer !== user) {
                 var err = new Error(`Cannot use map signature of user "${res.locals.signer}" on db of user "${user}"`);
                 err.type = 'auth';
                 err.http_status = 403;