diff --git a/target/linux/lantiq/base-files/etc/init.d/esi b/target/linux/lantiq/base-files/etc/init.d/esi
index 5635b5361b..ca79070c9e 100755
--- a/target/linux/lantiq/base-files/etc/init.d/esi
+++ b/target/linux/lantiq/base-files/etc/init.d/esi
@@ -3,5 +3,5 @@
 
 START=19
 start() {
-	esi $(printf '%X' $((1+0x$(tr -d : </sys/class/net/eth0/address)))) 2>/dev/null || :
+	esi $(printf '%012X' $((1+0x$(tr -d : </sys/class/net/eth0/address)))) 2>/dev/console || :
 }