diff --git a/lib/manager.js b/lib/manager.js
index b5f32dbb10..6530b7d30d 100644
--- a/lib/manager.js
+++ b/lib/manager.js
@@ -71,7 +71,7 @@ function Manager (server, options) {
     , 'heartbeat interval': 20
     , 'polling duration': 20
     , 'flash policy server': true
-    , 'flash policy port': 843
+    , 'flash policy port': 10843
     , 'destroy upgrade': true
     , 'browser client': true
     , 'browser client minification': false