diff --git a/webadmin/src/views/certs.html b/webadmin/src/views/certs.html
index 723811d68..0e991eed4 100644
--- a/webadmin/src/views/certs.html
+++ b/webadmin/src/views/certs.html
@@ -11,7 +11,7 @@
 
                         <div class="form-group" ng-class="{ 'has-error': false }">
                             <label class="control-label" for="customDomainId">Domain Name</label>
-                            <input type="text" class="form-control" ng-model="dnsCredentials.customDomain" id="customDomainId" name="customDomainId" ng-disabled="dnsCredentials.busy" ng-minlength="4" ng-maxlength="128" required autofocus>
+                            <input type="text" class="form-control" ng-model="dnsCredentials.customDomain" id="customDomainId" name="customDomainId" ng-disabled="dnsCredentials.busy" ng-minlength="4" ng-maxlength="128" placeholder="example.com" required autofocus>
                         </div>
 
                         <div class="form-group" ng-class="{ 'has-error': false }">