diff --git a/obsolete-buildroot/sources/openwrt/root/etc/init.d/S10boot b/obsolete-buildroot/sources/openwrt/root/etc/init.d/S10boot
index b650c9464e..f69c881bb3 100755
--- a/obsolete-buildroot/sources/openwrt/root/etc/init.d/S10boot
+++ b/obsolete-buildroot/sources/openwrt/root/etc/init.d/S10boot
@@ -5,7 +5,8 @@ echo "S" > /proc/jffs2_bbc
 
 mkdir -p /var/run
 
-[ "$(nvram get il0macaddr)" = "00:90:4c:5f:00:2a" ] && {
+[ -z "$(nvram get il0macaddr)" ] || \
+[    "$(nvram get il0macaddr)" = "00:90:4c:5f:00:2a" ] && {
   # if default wifi mac, set two higher than the lan mac
   nvram set il0macaddr=$(nvram get et0macaddr|
   awk '{OFS=FS=":";for(x=7,y=2;--x;){$x=sprintf("%02x",(y+="0x"$x)%256);y/=256}print}')