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-rw-r--r--lib/stdlib/doc/src/gen_statem.xml5
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/stdlib/doc/src/gen_statem.xml b/lib/stdlib/doc/src/gen_statem.xml
index d19602b67c..5eb13db1aa 100644
--- a/lib/stdlib/doc/src/gen_statem.xml
+++ b/lib/stdlib/doc/src/gen_statem.xml
@@ -1973,6 +1973,11 @@ handle_event(_, _, State, Data) ->
<v>Ignored = term()</v>
</type>
<desc>
+ <note>
+ <p>This callback is optional, so callback modules need not
+ export it. The <c>gen_statem</c> module provides a default
+ implementation without cleanup.</p>
+ </note>
<p>
This function is called by a <c>gen_statem</c>
when it is about to terminate. It is to be the opposite of