diff --git a/extra/modules/stores.py b/extra/modules/stores.py
index 84ab850..6441974 100644
--- a/extra/modules/stores.py
+++ b/extra/modules/stores.py
@@ -80,6 +80,8 @@ class ParthenayIdentityStore(InheritingIdentityStore):
         if t:
             return t
 
+        account.username = account.username.lower()
+
         # some twill magic
         twill.commands.reset_browser()
         twill.commands.go(