diff --git a/src/colab/custom_settings.py b/src/colab/custom_settings.py
index f67685a..38c04b3 100644
--- a/src/colab/custom_settings.py
+++ b/src/colab/custom_settings.py
@@ -262,7 +262,7 @@ FEEDZILLA_SITE_DESCRIPTION = _(u'Colab blog aggregator')
 
 
 ### Mailman API settings
-MAILMAN_API_URL = 'localhost:8000'
+MAILMAN_API_URL = 'http://localhost:8000'
 
 
 ### BrowserID / Persona
--
libgit2 0.21.2