diff --git a/websocket/api/api.script_api b/websocket/api/api.script_api
index b45397d..7c24a03 100644
--- a/websocket/api/api.script_api
+++ b/websocket/api/api.script_api
@@ -21,6 +21,10 @@
             type: number
             desc: Timeout for the connection sequence (milliseconds). Not used on HTML5. (Default is 3000)
 
+          - name: protocol
+            type: string
+            desc: the protocol to use (e.g. 'chat'). (Default is 'binary')
+
           - name: headers
             type: string
             desc: list of http headers. Each pair is separated with "\r\n". Not used on HTML5.