diff --git a/addons/web/static/src/js/coresetup.js b/addons/web/static/src/js/coresetup.js
index 43d292b66db..dedb4a49710 100644
--- a/addons/web/static/src/js/coresetup.js
+++ b/addons/web/static/src/js/coresetup.js
@@ -89,6 +89,10 @@ instance.web.Session = instance.web.JsonRPC.extend( /** @lends instance.web.Sess
         });
     },
     session_is_valid: function() {
+        var db = $.deparam.querystring().db;
+        if (db && this.db !== db) {
+            return false;
+        }
         return !!this.uid;
     },
     /**