diff --git a/lib/sync.js b/lib/sync.js
index 7af7bdc21..86e42ebb7 100644
--- a/lib/sync.js
+++ b/lib/sync.js
@@ -310,7 +310,7 @@ SyncApi.prototype._peekPoll = function(roomId, token) {
 
         res.chunk.filter(function(e) {
             return e.type === "m.presence";
-        }).map(self.client.getEventMapper()).map(function(presenceEvent) {
+        }).map(self.client.getEventMapper()).forEach(function(presenceEvent) {
             var user = self.client.store.getUser(presenceEvent.getContent().user_id);
             if (user) {
                 user.setPresenceEvent(presenceEvent);