diff --git a/admin/environment.xml b/admin/environment.xml
index 5fac54c6a9c76..1e937cd91c580 100644
--- a/admin/environment.xml
+++ b/admin/environment.xml
@@ -1006,6 +1006,11 @@
           <ON_CHECK message="settingfileuploads" />
         </FEEDBACK>
       </PHP_SETTING>
+      <PHP_SETTING name="opcache.enable" value="1" level="optional">
+        <FEEDBACK>
+          <ON_CHECK message="opcacherecommended" />
+        </FEEDBACK>
+      </PHP_SETTING>
     </PHP_SETTINGS>
   </MOODLE>
 </COMPATIBILITY_MATRIX>
diff --git a/lang/en/admin.php b/lang/en/admin.php
index 98c4c5552ce0f..4e963edd27fa5 100644
--- a/lang/en/admin.php
+++ b/lang/en/admin.php
@@ -770,6 +770,7 @@
 $string['notloggedinroleid'] = 'Role for visitors';
 $string['numberofmissingstrings'] = 'Number of missing strings: {$a}';
 $string['numberofstrings'] = 'Total number of strings: {$a->strings}<br />Missing: {$a->missing} ({$a->missingpercent}&nbsp;%)';
+$string['opcacherecommended'] = 'PHP opcode caching improves performance and lowers memory requirements, OPcache extension is recommended and fully supported.';
 $string['opensslrecommended'] = 'Installing the optional OpenSSL library is highly recommended -- it enables Moodle Networking functionality.';
 $string['opentogoogle'] = 'Open to Google';
 $string['optionalmaintenancemessage'] = 'Optional maintenance message';