diff --git a/tools/virsh.pod b/tools/virsh.pod
index 1a9c3dceeedb7b0513d808701b11a0c7e5ea9afc..614b5a3e86d7d7fb8960585343ea7c34beefd69f 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -1239,6 +1239,10 @@ the default one.
 I<model> allows to specify the model type.
 I<persistent> indicates the changes will affect the next boot of the domain.
 
+B<Note>: the optional target value is the name of a device to be created
+as the back-end on the node. If not provided a device named "vnetN" or "vifN"
+will be created automatically.
+
 =item B<detach-device> I<domain-id> I<FILE>
 
 Detach a device from the domain, takes the same kind of XML descriptions