diff --git a/zerver/lib/notifications.py b/zerver/lib/notifications.py
index e91a792aaf..5cb3a2fcb8 100644
--- a/zerver/lib/notifications.py
+++ b/zerver/lib/notifications.py
@@ -37,7 +37,7 @@ def unsubscribe_token(user_profile):
     # type: (UserProfile) -> Text
     # Leverage the Django confirmations framework to generate and track unique
     # unsubscription tokens.
-    return Confirmation.objects.get_link_for_object(user_profile).split("/")[-1]
+    return Confirmation.objects.get_link_for_object(user_profile, host='unused').split("/")[-1]
 
 def one_click_unsubscribe_link(user_profile, endpoint):
     # type: (UserProfile, Text) -> Text
diff --git a/zerver/views/auth.py b/zerver/views/auth.py
index 8d3e505426..d2cf9adc8b 100644
--- a/zerver/views/auth.py
+++ b/zerver/views/auth.py
@@ -65,7 +65,7 @@ def maybe_send_to_registration(request, email, full_name=''):
             request.get_host(),
             "/",
             # Split this so we only get the part after the /
-            Confirmation.objects.get_link_for_object(prereg_user).split("/", 3)[3],
+            Confirmation.objects.get_link_for_object(prereg_user, host='unused').split("/", 3)[3],
             '?full_name=',
             # urllib does not handle Unicode, so coerece to encoded byte string
             # Explanation: http://stackoverflow.com/a/5605354/90777