diff --git a/package/boot/uboot-envtools/files/mvebu b/package/boot/uboot-envtools/files/mvebu
index 25f29599a3aa4..7136d5b4cdf4b 100644
--- a/package/boot/uboot-envtools/files/mvebu
+++ b/package/boot/uboot-envtools/files/mvebu
@@ -17,7 +17,10 @@ buffalo,ls421de)
 	ubootenv_add_uci_config "/dev/mtd3" "0x0" "0x10000"
 	;;
 cznic,turris-omnia)
-	if grep -q 'U-Boot 2015.10-rc2' /dev/mtd0; then
+	idx="$(find_mtd_index u-boot-env)"
+	if [ -n "$idx" ]; then
+		ubootenv_add_uci_config "/dev/mtd${idx}" "0x0" "0x10000" "0x10000"
+	elif grep -q 'U-Boot 2015.10-rc2' /dev/mtd0; then
 		ubootenv_add_uci_config "/dev/mtd0" "0xc0000" "0x10000" "0x40000"
 	else
 		ubootenv_add_uci_config "/dev/mtd0" "0xf0000" "0x10000" "0x10000"