diff --git a/agent/cloud-agent.8 b/agent/cloud-agent.8
index 0d75f0c..5b88044 100644
--- a/agent/cloud-agent.8
+++ b/agent/cloud-agent.8
@@ -57,6 +57,10 @@ dhcp
 The agent itself.
 .It Pa /usr/local/bin/cms
 The CMS binary that is used to decrypt messages from the Azure fabric.
+.It Pa /var/db/cloud-instance
+The instance ID as reported by the cloud.
+.Nm
+reprovisions the system when the value has changed.
 .El
 .Sh SEE ALSO
 .Xr meta-data 8 ,