diff --git a/collects/net/scribblings/websocket.scrbl b/collects/net/scribblings/websocket.scrbl
index 825f7742fd..d55cbbd762 100644
--- a/collects/net/scribblings/websocket.scrbl
+++ b/collects/net/scribblings/websocket.scrbl
@@ -74,6 +74,8 @@ This module also provides the exports from @racketmodname[net/websocket/conn].
 
 @defmodule[net/websocket/conn]
 
+WebSocket connection are synchronizable events.
+
 @defparam[framing-mode mode (symbols 'old 'new)]{ Controls whether framing is as before August 16th, 2010 or after. (Most Web browsers currently support only @racket['old] and they are incompatible, so you must choose the correct one.) Defaults to @racket['old].}
 
 @defproc[(ws-conn? [x any/c]) boolean?]{ Returns true if @racket[x] is a WebSocket connection. }
diff --git a/collects/net/websocket/conn.rkt b/collects/net/websocket/conn.rkt
index ca18d03731..46606fcd16 100644
--- a/collects/net/websocket/conn.rkt
+++ b/collects/net/websocket/conn.rkt
@@ -3,7 +3,8 @@
 
 (define framing-mode (make-parameter 'old))
 
-(struct ws-conn ([closed? #:mutable] line headers ip op))
+(struct ws-conn ([closed? #:mutable] line headers ip op)
+        #:property prop:evt (struct-field-index ip))
 (define (open-ws-conn? x)
   (and (ws-conn? x) (not (ws-conn-closed? x))))
 (provide/contract