diff --git a/src/applications/helper/bulk-send-helper.h b/src/applications/helper/bulk-send-helper.h
index af714b0e0..803b11d91 100644
--- a/src/applications/helper/bulk-send-helper.h
+++ b/src/applications/helper/bulk-send-helper.h
@@ -49,7 +49,7 @@ class BulkSendHelper
      * \param protocol the name of the protocol to use to send traffic
      *        by the applications. This string identifies the socket
      *        factory type used to create sockets for the applications.
-     *        A typical value would be ns3::UdpSocketFactory.
+     *        A typical value would be ns3::TcpSocketFactory.
      * \param address the address of the remote node to send traffic
      *        to.
      */