diff --git a/synapse/push/__init__.py b/synapse/push/__init__.py
index 1cac5fff4e..10ac890482 100644
--- a/synapse/push/__init__.py
+++ b/synapse/push/__init__.py
@@ -270,7 +270,7 @@ class Pusher(object):
         """
         Overridden by implementing classes to actually deliver the notification
         Args:
-            p The event to notify for as a single event from the event stream
+            p: The event to notify for as a single event from the event stream
         Returns: If the notification was delivered, an array containing any
                  pushkeys that were rejected by the push gateway.
                  False if the notification could not be delivered (ie.