diff --git a/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml b/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml
index 4442a173e..81f703af4 100644
--- a/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml
+++ b/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml
@@ -308,7 +308,7 @@
         <id>validation.dns_nsupdate_key</id>
         <label>Secret Key</label>
         <type>textbox</type>
-        <help></help>
+        <help><![CDATA[Requires the the whole key file in a format that is compatible with nsupdate.]]></help>
     </field>
     <field>
         <label>DNS-01/OVH</label>