diff --git a/src/packages/collaboration/lib/guest-session.coffee b/src/packages/collaboration/lib/guest-session.coffee
index 46c185fbe..9933f1f8c 100644
--- a/src/packages/collaboration/lib/guest-session.coffee
+++ b/src/packages/collaboration/lib/guest-session.coffee
@@ -24,7 +24,7 @@ class GuestSession
       console.log 'connection opened'
       @trigger 'connection-opened'
 
-    connection.on 'data', (data) =>
+    connection.once 'data', (data) =>
       console.log 'received document', data
       @trigger 'connection-document-received'
       @createTelepathDocument(data, connection)