[Libguestfs] virt-resize does not work

Hi, Im trying to expand an linux image but it does not seem to get bigger after everything is completed. The thing i noticed was, i am trying to expand a /dev/vda1 within the image but virt-resize keeps referring it as /dev/sda1. See below: # virt-resize --dry-run --expand /dev/vda1 test.qcow2 test-new.qcow2 Examining test.qcow2 ... ********** Summary of changes: /dev/sda1: This partition will be resized from 13.4G to 23.4G. The filesystem ext3 on /dev/sda1 will be expanded using the 'resize2fs' method. /dev/sda2: This partition will be left alone. ********** Is this a bug or am i doing something wrong? Thx!