diff --git a/man/corosync-cfgtool.8 b/man/corosync-cfgtool.8
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--- a/man/corosync-cfgtool.8
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@@ -1,100 +1,104 @@
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 .\" * Author: Angus Salkeld <asalkeld@redhat.com>
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 .TH "COROSYNC-CFGTOOL" "8" "2020-02-10" "" ""
 .SH "NAME"
 corosync-cfgtool \- An administrative tool for corosync.
 .SH "SYNOPSIS"
 .B corosync\-cfgtool [[\-i IP_address] [\-b] \-s] [\-R] [\-L] [\-k nodeid] [\-a nodeid] [\-h] [\-H]
 .SH "DESCRIPTION"
 .B corosync\-cfgtool
 A tool for displaying and configuring active parameters within corosync.
 .SH "OPTIONS"
 .TP
 .B -i
 Finds only information about the specified interface IP address or link id with -s.
 .TP 
 .B -s
 Displays the status of the current links on this node for UDP/UDPU, with extended status
 for KNET.
 After each link, the nodes on that link are displayed in order with their status,
 for example there are 3 nodes with KNET transportation:
 
 LINK ID 0
         addr    = 192.168.100.80
         status:
                 nodeid  1:      localhost
                 nodeid  2:      connected
                 nodeid  3:      connected
 .TP
 .B -b
 Displays the brief status of the current links on this node (KNET only) when used
 with "-s". If any interfaces are faulty, 1 is returned by the binary. If all interfaces
 are active 0 is returned to the shell.
 After each link, the nodes on that link are displayed in order with their status
 encoded into a single digit, or characters 'n', 'd' and '?' with special meaning.
 1=link enabled, 2=link connected, So a 3 in a node position indicates that the
 link is both enabled and connected. Status represented by character 'n' is used for
 localhost link. Character '?' means that Crosync was unable to get status of link from knet (log
 should contain more information). Character 'd' shouldn't appear and it means that Corosync
 was unable to configure a link and it is result of some error which should have been logged.
 
 The output will be:
 
 LINK ID 0
         addr    = 192.168.100.80
         status  = n33
 .TP
 .B -R
 Tell all instances of corosync in this cluster to reload corosync.conf.
+
+Running corosync-cfgtool -R where nodes are running different versions
+of corosync (including minor versions) is unsupported and may result in undefined
+behaviour.
 .TP
 .B -L
 Tell corosync to reopen all logging files. In contrast to other subcommands,
 nothing is displayed on terminal if call is successful.
 .TP
 .B -k
 Kill a node identified by node id.
 .TP
 .B -a
 Display the IP address(es) of a node.
 .TP
 .B -h
 Print basic usage.
 .TP
 .B -H
 Shutdown corosync cleanly on this node.
 .SH "SEE ALSO"
 .BR corosync_overview (7),
 .SH "AUTHOR"
 Angus Salkeld
 .PP