diff --git a/files/initrd/opt/rr/boot.sh b/files/initrd/opt/rr/boot.sh
index 8da5c7df..98495a61 100755
--- a/files/initrd/opt/rr/boot.sh
+++ b/files/initrd/opt/rr/boot.sh
@@ -156,8 +156,6 @@ if [ -z "${MAC1}" ]; then
     MAC2=""
     writeConfigKey "mac1" "${MAC1}" "${USER_CONFIG_FILE}"
     writeConfigKey "mac2" "${MAC2}" "${USER_CONFIG_FILE}"
-    CMDLINE['mac1']="${MAC1}"
-    CMDLINE['netif_num']="0"
   else
     NETIF_NUM=2
     MACS="$(generateMacAddress "${MODEL}" ${NETIF_NUM})"
@@ -165,11 +163,10 @@ if [ -z "${MAC1}" ]; then
       eval MAC${I}="$(echo ${MACS} | cut -d' ' -f${I})"
       writeConfigKey "mac${I}" "$(echo ${MACS} | cut -d' ' -f${I})" "${USER_CONFIG_FILE}"
     done
-    CMDLINE['mac1']="${MAC1}"
-    CMDLINE['mac2']="${MAC2}"
-    CMDLINE['netif_num']="${NETIF_NUM}"
   fi
 fi
+[ -n "${MAC1}" ] && CMDLINE['mac1']="${MAC1}" && CMDLINE['netif_num']="1"
+[ -n "${MAC2}" ] && CMDLINE['mac2']="${MAC2}" && CMDLINE['netif_num']="2"
 
 CMDLINE['skip_vender_mac_interfaces']="$(seq -s, 0 $((${CMDLINE['netif_num']:-1} - 1)))"