diff --git a/lib/server/join.js b/lib/server/join.js
index bf0f0a06..3679c0b3 100644
--- a/lib/server/join.js
+++ b/lib/server/join.js
@@ -53,7 +53,7 @@
                 var errorStr;
                 
                 if (error)
-                    if (!response.headersSent)
+                    if (!res.headersSent)
                         main.sendError({
                             request     : req,
                             response    : res,