diff --git a/lib/http-proxy/common.js b/lib/http-proxy/common.js
index bc6efd9..43919b1 100644
--- a/lib/http-proxy/common.js
+++ b/lib/http-proxy/common.js
@@ -140,8 +140,9 @@ common.urlJoin = function() {
       lastIndex = args.length - 1,
       last = args[lastIndex],
       lastSegs = last.split('?'),
-      args[lastIndex] = lastSegs[0],
       retSegs;
+      
+  args[lastIndex] = lastSegs[0];
 
   //
   // Join all strings, but remove empty strings so we don't get extra slashes from