diff --git a/tryton/gui/main.py b/tryton/gui/main.py
index cddeed7793..4bb40f11aa 100644
--- a/tryton/gui/main.py
+++ b/tryton/gui/main.py
@@ -1141,7 +1141,8 @@ class Main(object):
             return ([], [])
 
     def sig_login(self, widget=None, dbname=False, res=None):
-        self.sig_logout(widget, disconnect=False)
+        if not self.sig_logout(widget, disconnect=False):
+            return
         if not res:
             try:
                 dblogin = DBLogin(self.window)