diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml
index 2e9b87645f..301fe77ce9 100644
--- a/man/systemd.unit.xml
+++ b/man/systemd.unit.xml
@@ -1166,6 +1166,8 @@
         <para><replaceable>interval</replaceable> is a time span with the default unit of seconds, but other
         units may be specified, see
         <citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+        The special value <literal>infinity</literal> can be used to limit the total number of start
+        attempts, even if they happen at large time intervals.
         Defaults to <varname>DefaultStartLimitIntervalSec=</varname> in manager configuration file, and may
         be set to 0 to disable any kind of rate limiting. <replaceable>burst</replaceable> is a number and
         defaults to <varname>DefaultStartLimitBurst=</varname> in manager configuration file.</para>