diff --git a/modules.d/40network/net-genrules.sh b/modules.d/40network/net-genrules.sh
index 50e223d2..7714614d 100755
--- a/modules.d/40network/net-genrules.sh
+++ b/modules.d/40network/net-genrules.sh
@@ -44,6 +44,10 @@ fi
         IFACES+=" $phydevice"
     fi
 
+    if [ -z "$IFACES" ]; then
+        [ -e /tmp/net.ifaces ] && read IFACES < /tmp/net.ifaces
+    fi
+
     ifup='/sbin/ifup $env{INTERFACE}'
     [ -z "$netroot" ] && ifup="$ifup -m"