Reporting of NTFS Compressed files

The RamDisk image file (RamDisk.img) is an NTFS compressed file. It is reported by Defraggler as its 4GB size not it's size on disk of 128MB. post-70703-0-40435800-1421168551_thumb.jpgpost-70703-0-38804500-1421168561_thumb.jpg This makes me wonder if Defraggler handles NTFS compressed files correctly?