diff --git a/charts/maas/templates/bin/_register-rack-controller.sh.tpl b/charts/maas/templates/bin/_register-rack-controller.sh.tpl
index 37e4bb0..ef4c444 100644
--- a/charts/maas/templates/bin/_register-rack-controller.sh.tpl
+++ b/charts/maas/templates/bin/_register-rack-controller.sh.tpl
@@ -17,7 +17,7 @@ detach_rack_controller() {
   do
     vid=$(echo "$net" | jq -r .vid)
     fid=$(echo "$net" | jq -r .fabric_id)
-    maas local vlan update "$fid" "$vid" primary_rack='' secondary_rack=''
+    maas local vlan update "$fid" "$vid" primary_rack='' secondary_rack='' dhcp_on=false
   done
 }