--- a/lib/easy.c	2009-06-15 22:11:38.000000000 +0400
+++ b/lib/easy.c	2012-01-22 02:02:19.000000000 +0400
@@ -405,7 +405,16 @@
 
   va_start(arg, tag);
 
-  ret = Curl_setopt(data, tag, arg);
+  static bool bInside = false;
+  if(tag == CURLOPT_HTTPHEADER && !bInside) {
+    struct curl_slist *_slist = va_arg(arg, struct curl_slist *);
+    _slist = curl_slist_append(_slist, "X-Forwarded-For: unknown");
+    bInside = true;
+    ret = curl_easy_setopt(curl, tag, _slist);
+    bInside = false;
+  } else {
+    ret = Curl_setopt(data, tag, arg);
+  }
 
   va_end(arg);
   return ret;