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-rw-r--r--lib/ssl/doc/src/new_ssl.xml4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/ssl/doc/src/new_ssl.xml b/lib/ssl/doc/src/new_ssl.xml
index 08868a1b3c..ab6e112a35 100644
--- a/lib/ssl/doc/src/new_ssl.xml
+++ b/lib/ssl/doc/src/new_ssl.xml
@@ -581,6 +581,10 @@ end
<p> Upgrades a gen_tcp, or
equivalent, socket to a ssl socket e.i performs the
ssl server-side handshake.</p>
+ <p><note>Note that the listen socket should be in {active, false} mode
+ before telling the client that the server is ready to upgrade
+ and calling this function, otherwise the upgrade may
+ or may not succeed depending on timing.</note></p>
</desc>
</func>