--- a/xml/en/docs/http/ngx_http_memcached_module.xml
+++ b/xml/en/docs/http/ngx_http_memcached_module.xml
@@ -10,7 +10,7 @@
 <module name="Module ngx_http_memcached_module"
         link="/en/docs/http/ngx_http_memcached_module.html"
         lang="en"
-        rev="16">
+        rev="17">
 
 <section id="summary">
 
@@ -318,6 +318,25 @@ the connection is closed.
 
 </directive>
 
+
+<directive name="memcached_socket_keepalive">
+<syntax><literal>on</literal> | <literal>off</literal></syntax>
+<default>off</default>
+<context>http</context>
+<context>server</context>
+<context>location</context>
+<appeared-in>1.15.6</appeared-in>
+
+<para>
+Configures the “TCP keepalive” behavior
+for outgoing connections to a memcached server.
+By default, the operating system’s settings are in effect for the socket.
+If the directive is set to the value “<literal>on</literal>”, the
+<c-def>SO_KEEPALIVE</c-def> socket option is turned on for the socket.
+</para>
+
+</directive>
+
 </section>