diff --git a/net/vlan.sh b/net/vlan.sh
index 48838ef8..d54adeb9 100644
--- a/net/vlan.sh
+++ b/net/vlan.sh
@@ -87,7 +87,7 @@ vlan_post_start()
 
 		# We need to work out the interface name of our new vlan id
 		local ifname="$(sed -n -e \
-			's/^\([^[:space:]]*\) *| '"${vlan}"' *| .*'"${iface}"'$/\1/p' \
+			's/^\([^[:space:]]*\) *| '"${vlan}"' *| .*'"${IFACE}"'$/\1/p' \
 			/proc/net/vlan/config )"
 		mark_service_started "net.${ifname}"
 		(