diff --git a/src/applications/helper/udp-client-server-helper.h b/src/applications/helper/udp-client-server-helper.h
index 39ab10c6c..81de69828 100644
--- a/src/applications/helper/udp-client-server-helper.h
+++ b/src/applications/helper/udp-client-server-helper.h
@@ -153,7 +153,7 @@ private:
  * \ingroup udpclientserver
  * Create UdpTraceClient application which sends UDP packets based on a trace
  * file of an MPEG4 stream. Trace files could be downloaded form :
- * http://www.tkn.tu-berlin.de/research/trace/ltvt.html (the 2 first lines of
+ * http://www2.tkn.tu-berlin.de/research/trace/ltvt.html (the 2 first lines of
  * the file should be removed)
  * A valid trace file is a file with 4 columns:
  * \li -1- the first one represents the frame index
diff --git a/src/applications/model/udp-trace-client.h b/src/applications/model/udp-trace-client.h
index 9aff55144..a64dcf6fe 100644
--- a/src/applications/model/udp-trace-client.h
+++ b/src/applications/model/udp-trace-client.h
@@ -40,7 +40,7 @@ class Packet;
  *
  * Sends UDP packets based on a trace file of an MPEG4 stream
  * trace files could be downloaded form:
- * http://www.tkn.tu-berlin.de/research/trace/ltvt.html (the 2 first lines of
+ * http://www2.tkn.tu-berlin.de/research/trace/ltvt.html (the 2 first lines of
  * the file should be removed)
  * A valid trace file is a file with 4 columns:
  * \li -1- the first one represents the frame index