diff --git a/qm-cloud-init-opts.adoc b/qm-cloud-init-opts.adoc
index 705a8c5..67b2edd 100644
--- a/qm-cloud-init-opts.adoc
+++ b/qm-cloud-init-opts.adoc
@@ -17,7 +17,7 @@ Specify IP addresses and gateways for the corresponding interface.
 IP addresses use CIDR notation, gateways are optional but need an IP of the same type specified.
 +
 The special string 'dhcp' can be used for IP addresses to use DHCP, in which case no explicit gateway should be provided.
-For IPv6 the special string 'auto' can be used to use stateless autoconfiguration.
+SLAAC is not supported by cloud-init but at least netplan activates SLAAC when selecting 'dhcp' so it should work with up-to-date netplan versions.
 +
 If cloud-init is enabled and neither an IPv4 nor an IPv6 address is specified, it defaults to using dhcp on IPv4.