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-rw-r--r--lib/kernel/doc/src/heart.xml7
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/kernel/doc/src/heart.xml b/lib/kernel/doc/src/heart.xml
index 5b5b71e521..ad1a2ffeb9 100644
--- a/lib/kernel/doc/src/heart.xml
+++ b/lib/kernel/doc/src/heart.xml
@@ -4,7 +4,7 @@
<erlref>
<header>
<copyright>
- <year>1996</year><year>2016</year>
+ <year>1996</year><year>2018</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
@@ -59,8 +59,9 @@
<pre>
% <input>erl -heart -env HEART_BEAT_TIMEOUT 30 ...</input></pre>
<p>The value (in seconds) must be in the range 10 &lt; X &lt;= 65535.</p>
- <p>Notice that if the system clock is adjusted with
- more than <c>HEART_BEAT_TIMEOUT</c> seconds, <c>heart</c>
+ <p>When running on OSs lacking support for monotonic time,
+ <c>heart</c> is susceptible to system clock adjustments of more than
+ <c>HEART_BEAT_TIMEOUT</c> seconds. When this happens, <c>heart</c>
times out and tries to reboot the system. This can occur, for
example, if the system clock is adjusted automatically by use of the
Network Time Protocol (NTP).</p>