diff --git a/gluon/tools.py b/gluon/tools.py
index 9345f24c..998368fd 100644
--- a/gluon/tools.py
+++ b/gluon/tools.py
@@ -1930,7 +1930,7 @@ class Auth(object):
             parts = next.split('/')
             if not ':' in parts[0]:
                 return next
-            elif len(parts)>2 and parts[0].endswith(':') and parts[1:3]==('', host):
+            elif len(parts)>2 and parts[0].endswith(':') and parts[1:3]==['', host]:
                 return next
         return None