diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index bd99ae0cb2..ed173896c7 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -3701,12 +3701,12 @@
   ...
   <devices>
     <interface type='server'>
-      <mac address='52:54:00:22:c9:42'>
+      <mac address='52:54:00:22:c9:42'/>
       <source address='192.168.0.1' port='5558'/>
     </interface>
     ...
     <interface type='client'>
-      <mac address='52:54:00:8b:c9:51'>
+      <mac address='52:54:00:8b:c9:51'/>
       <source address='192.168.0.1' port='5558'/>
     </interface>
   </devices>