diff --git a/reference/openssl/ini.xml b/reference/openssl/ini.xml
index 234f43b76df5..4e2f5e5a0fea 100644
--- a/reference/openssl/ini.xml
+++ b/reference/openssl/ini.xml
@@ -28,6 +28,12 @@
       <entry><constant>INI_PERDIR</constant></entry>
       <entry></entry>
      </row>
+     <row>
+      <entry>openssl.libctx</entry>
+      <entry>"custom"</entry>
+      <entry><constant>INI_PERDIR</constant></entry>
+      <entry></entry>
+     </row>
     </tbody>
    </tgroup>
   </table>
@@ -64,6 +70,23 @@
      </para>
     </listitem>
    </varlistentry>
+   <varlistentry xml:id="ini.openssl.libctx">
+    <term>
+     <parameter>openssl.libctx</parameter>
+     <type>string</type>
+    </term>
+    <listitem>
+     <simpara>
+      Specifies the type of OpenSSL library context to use.
+      The default value, <literal>custom</literal>, creates a separate
+      library context for each worker or thread.
+      This improves isolation from other libraries using OpenSSL and,
+      in ZTS builds, increases separation between threads.
+      It is also possible to use the <literal>default</literal> value, which
+      causes PHP to use OpenSSL's global default library context.
+     </simpara>
+    </listitem>
+   </varlistentry>
   </variablelist>
  </para>