diff --git a/man/jail.conf.5 b/man/jail.conf.5
index e79ecd14..f8f076c6 100644
--- a/man/jail.conf.5
+++ b/man/jail.conf.5
@@ -129,6 +129,8 @@ name of the filter -- filename of the filter in /etc/fail2ban/filter.d/ without
 .TP
 .B logpath
 filename(s) of the log files to be monitored. Globs -- paths containing * and ? or [0-9] -- can be used however only the files that exist at start up matching this glob pattern will be considered.
+
+Ensure syslog or the program that generates the log file isn't configured to compress repeated log messages to "\fI*last message repeated 5 time*s\fR" otherwise it will fail to detect. This is called \fIRepeatedMsgReduction\fR in rsyslog and should be \fIOff\fR.
 .TP
 .B action
 action(s) from \fI/etc/fail2ban/action.d/\fR without the \fI.conf\fR/\fI.local\fR extension. Arguments can be passed to actions to override the default values from the [Init] section in the action file. Arguments are specified by [name=value,name2=value]. Values can also be quoted. More that one action can be specified (in separate lines).