diff --git a/client/src/__locales/en.json b/client/src/__locales/en.json
index 2f83394d..10471501 100644
--- a/client/src/__locales/en.json
+++ b/client/src/__locales/en.json
@@ -115,6 +115,7 @@
     "example_comment": "! Here goes a comment",
     "example_comment_meaning": "just a comment",
     "example_comment_hash": "# Also a comment",
+    "example_regex_meaning": "block access to the domains matching the specified regular expression",
     "example_upstream_regular": "regular DNS (over UDP)",
     "example_upstream_dot": "encrypted <a href='https:\/\/en.wikipedia.org\/wiki\/DNS_over_TLS' target='_blank'>DNS-over-TLS<\/a>",
     "example_upstream_doh": "encrypted <a href='https:\/\/en.wikipedia.org\/wiki\/DNS_over_HTTPS' target='_blank'>DNS-over-HTTPS<\/a>",
diff --git a/client/src/components/Filters/UserRules.js b/client/src/components/Filters/UserRules.js
index f03b5380..9aae0281 100644
--- a/client/src/components/Filters/UserRules.js
+++ b/client/src/components/Filters/UserRules.js
@@ -52,6 +52,9 @@ class UserRules extends Component {
                         <li>
                             <code>{ t('example_comment_hash') }</code> - { t('example_comment_meaning') }
                         </li>
+                        <li>
+                            <code>/REGEX/</code> - { t('example_regex_meaning') }
+                        </li>
                     </ol>
                 </div>
             </Card>