1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/handlers/presence.py b/synapse/handlers/presence.py
index 73ec45c9cb..7e725d1027 100644
--- a/synapse/handlers/presence.py
+++ b/synapse/handlers/presence.py
@@ -383,7 +383,7 @@ class PresenceHandler(BaseHandler):
         logger.debug("Start polling for presence from %s", user)
 
         if target_user:
-            target_users = set(target_user)
+            target_users = set([target_user])
         else:
             presence = yield self.store.get_presence_list(
                 user.localpart, accepted=True