diff --git a/gluon/tools.py b/gluon/tools.py
index 7a185f21..22bbbd44 100644
--- a/gluon/tools.py
+++ b/gluon/tools.py
@@ -2361,6 +2361,8 @@ class Auth(object):
         if next is DEFAULT:
             # important for security
             next = settings.login_next
+            if callable(next):
+                next = next()
             user_next = snext
             if user_next:
                 external = user_next.split('://')