sgdisk: Force alignment of end sector

I am trying to get sgdisk to create partitions that align on 1 MB. This is easy for the starting sector (using -a), and for the ending sector, if I choose the size. But if I let sgdisk choose the ending sector I end up with something like: ~~~ Device Start End Sectors Size Type /dev/disk/by-id/scsi-36848f690d917dc002587bfae06302a5a-part2 2048 1046527 1044480 510M EFI System /dev/disk/by-id/scsi-36848f690d917dc002587bfae06302a5a-part3 1048576 5242879 4194304 2G Solaris /usr & Apple Z /dev/disk/by-id/scsi-36848f690d917dc002587bfae06302a5a-part4 5242880 467660800 462417921 220.5G Linux filesystem ~~~ And a size of 462417921 is clearly not aligned to a 1 MB block. I would have expected something like: /dev/disk/by-id/scsi-36848f690d917dc002587bfae06302a5a-part4 5242880 466616319 461373440 220G Linux filesystem It seems -a only applies to the starting sector. How can I make it align the ending sector, too, for the rest-of-the-disk partition? The partition table is made with: sgdisk --zap-all $DISK sgdisk -n2:1M:+510M -t2:EF00 $DISK sgdisk -a 1048576 -n3:0:+2G -t3:BF01 $DISK # Use the rest of the disk for the final partition # and it is here the end sector is not aligned sgdisk -a 1048576 -n4:0:-0 -t4:BF01 $DISK