1 files changed, 1 insertions, 0 deletions
diff --git a/synapse/push/mailer.py b/synapse/push/mailer.py
index 5d60c1efcf..2be294f52e 100644
--- a/synapse/push/mailer.py
+++ b/synapse/push/mailer.py
@@ -397,6 +397,7 @@ class Mailer(object):
             return ""
 
         serverAndMediaId = value[6:]
+        fragment = None
         if '#' in serverAndMediaId:
             (serverAndMediaId, fragment) = serverAndMediaId.split('#', 1)
             fragment = "#" + fragment