diff --git a/wcsinst/settings.py b/wcsinst/settings.py
index fcfd6be..e27e992 100644
--- a/wcsinst/settings.py
+++ b/wcsinst/settings.py
@@ -16,7 +16,7 @@ if 'ADMINS' in os.environ:
     ADMINS = [ admin.split(';') for admin in ADMINS ]
     for admin in ADMINS:
         assert len(admin) == 2, 'ADMINS setting must be a colon separated list of name and emails separated by a semi-colon'
-        assert '@' in admin[1], 'ADMINS setting pairs second value must be emails
+        assert '@' in admin[1], 'ADMINS setting pairs second value must be emails'
 
 MANAGERS = ADMINS