diff --git a/openwrt/viirb-1-firmware-upgrade.sh b/openwrt/viirb-1-firmware-upgrade.sh
index 4cdace7..0f91c70 100755
--- a/openwrt/viirb-1-firmware-upgrade.sh
+++ b/openwrt/viirb-1-firmware-upgrade.sh
@@ -36,7 +36,7 @@ else
 fi
 
 scp ${filename} root@${scp_ip}:/tmp
-ssh root@${viirb_ip} "sysupgrade /tmp/*.bin"
+ssh root@${viirb_ip} "sysupgrade -n /tmp/*.bin"
 
 # It still pings for some time - wait for the reboot to happen
 echo "Waiting for VIIRB to really disappear"