diff --git a/HISTORY b/HISTORY
index bc245fa4..8c7987a2 100644
--- a/HISTORY
+++ b/HISTORY
@@ -9261,3 +9261,4 @@ Video Disk Recorder Revision History
   even if no Response parameter is given.
 - Replaced the warning regarding the open SVDRP port in the INSTALL file with a remark
   about using svdrphosts.conf to completely disable SVDRP access.
+- Added a note about the fixed UDP port for SVDRP discovery to vdr.1.
diff --git a/vdr.1 b/vdr.1
index 0ce3eed8..14c130fe 100644
--- a/vdr.1
+++ b/vdr.1
@@ -8,7 +8,7 @@
 .\" License as specified in the file COPYING that comes with the
 .\" vdr distribution.
 .\"
-.\" $Id: vdr.1 4.2 2015/04/19 12:39:13 kls Exp $
+.\" $Id: vdr.1 4.3 2018/02/09 15:21:06 kls Exp $
 .\"
 .TH vdr 1 "19 Feb 2015" "2.2" "Video Disk Recorder"
 .SH NAME
@@ -158,7 +158,10 @@ Don't use the keyboard as an input device.
 Use \fIport\fR for SVDRP. A value of \fB0\fR turns off SVDRP.
 The default SVDRP port is \fB6419\fR.
 You need to edit the file \fIsvdrphosts.conf\fR in order to enable
-access to the SVDRP port.
+access to the SVDRP port from hosts other than the localhosts.
+Note that this option only changes the TCP port used for SVDRP commands.
+The UDP port for discovering peer VDRs in the same network is always set
+to 6419 and can't be changed.
 .TP
 .BI \-P\  options ,\ \-\-plugin= options
 Load a plugin, defined by the given \fIoptions\fR.