diff --git a/src/opnsense/mvc/app/models/OPNsense/IPsec/IPsec.xml b/src/opnsense/mvc/app/models/OPNsense/IPsec/IPsec.xml
index 03cc3dc57..5b89e5b35 100644
--- a/src/opnsense/mvc/app/models/OPNsense/IPsec/IPsec.xml
+++ b/src/opnsense/mvc/app/models/OPNsense/IPsec/IPsec.xml
@@ -37,6 +37,7 @@
             <preSharedKey type="ArrayField">
                 <ident type="TextField">
                     <Required>Y</Required>
+                    <mask>/^([a-zA-Z0-9@\.\-]*)/u</mask>
                     <ValidationMessage>The identifier contains invalid characters.</ValidationMessage>
                     <Constraints>
                         <check001>