diff --git a/src/authentic2_cut/middlewares.py b/src/authentic2_cut/middlewares.py
index 3ee5713..d2444ca 100644
--- a/src/authentic2_cut/middlewares.py
+++ b/src/authentic2_cut/middlewares.py
@@ -35,7 +35,7 @@ class CUTMiddleware(object):
             url = next_url or request.GET.get('redirect_uri')
             netloc = urlparse.urlparse(url).netloc
             if netloc:
-                domain = netloc.split(':')[-1]
+                domain = netloc.split(':')[0]
 
         if hasattr(request, 'session'):
             if not domain: