docs: Adding reference to ndnSIM mailing list
diff --git a/helper/ndn-header-helper.h b/helper/ndn-header-helper.h
index f89c7d3..d7ea296 100644
--- a/helper/ndn-header-helper.h
+++ b/helper/ndn-header-helper.h
@@ -83,7 +83,7 @@
    *                          |               |
    *                      terminator      DTAG (Dictionary TAG)
    *
-   * \see http://www.ndn.org/releases/latest/doc/technical/BinaryEncoding.html
+   * \see http://www.ccnx.org/releases/latest/doc/technical/BinaryEncoding.html
    */
   
   static Type