diff --git a/target/linux/imx6/image/recovery-apalis b/target/linux/imx6/image/recovery-apalis
index c1c5a3f5d6..d75b954345 100644
--- a/target/linux/imx6/image/recovery-apalis
+++ b/target/linux/imx6/image/recovery-apalis
@@ -4,6 +4,7 @@ mmc dev 0 1
 mmc write 0x12100000 0x2 0x800
 
 # flash openwrt-imx6-apalis-squashfs.combined.bin
+setenv set_blkcnt 'setexpr blkcnt ${filesize} + 0x1ff && setexpr blkcnt ${blkcnt} / 0x200'
 run set_blkcnt
 mmc dev 0 0
 mmc write 0x12500000 0 ${blkcnt}