diff --git a/src/setupdns.html b/src/setupdns.html
index 8068ada3e..a428c6215 100644
--- a/src/setupdns.html
+++ b/src/setupdns.html
@@ -91,6 +91,7 @@
                             <div class="form-group" style="margin-bottom: 0;" ng-class="{ 'has-error': dnsCredentialsForm.domain.$dirty && dnsCredentialsForm.domain.$invalid }">
                               <label class="control-label">Domain  <sup><a ng-href="https://docs.cloudron.io/installation/#domain-setup" class="help" target="_blank"><i class="fa fa-question-circle"></i></a></sup></label>
                               <input type="text" class="form-control" ng-model="dnsCredentials.domain" name="domain" placeholder="example.com" required autofocus ng-disabled="dnsCredentials.busy">
+                              <div class="text-danger" ng-show="dnsCredentials.domain.indexOf('my.') === 0 && dnsCredentials.domain.length > 3">Are you sure about this domain? The dashboard will be at <b>my.{{ dnsCredentials.domain }}</b></div>
                               <p style="margin-top: 5px; font-size: 13px;">
                                 Apps will be installed on subdomains of this domain. The dashboard will be available on the <b>my</b> subdomain. You can add more domains later.
                               </p>