diff --git a/config/tools/xml/cluster.rng.in.head b/config/tools/xml/cluster.rng.in.head
index af6aa12..b994096 100644
--- a/config/tools/xml/cluster.rng.in.head
+++ b/config/tools/xml/cluster.rng.in.head
@@ -820,6 +820,7 @@ To validate your cluster.conf against this schema, run:
<attribute name="name" rha:description="A name that is used to
reference this fence device from clusternode fence section.
+ For XML validation purposes, it shall not start with a digit.
fenced(8)">
<data type="ID"/>
</attribute>
--
1.7.11.2