Hi, after I upgraded to Linux v4.17.8 in Debian/buster today, I had the same issue.
root@iniza:~# cat /proc/version Linux version 4.17.0-1-amd64 (debian-ker...@lists.debian.org) (gcc version 7.3.0 (Debian 7.3.0-26)) #1 SMP Debian 4.17.8-1 (2018-07-20) With upgrading to virtualbox{-dkms,-qt} (5.2.16-dfsg-3) from Debian/sid I was able to build with no errors... root@iniza:~# LANG=C dkms status virtualbox -v 5.2.16 -k 4.17.0-1-amd64 virtualbox, 5.2.16, 4.17.0-1-amd64, x86_64: installed So, please provide the above working version in Debian/buster. Thanks. Regards, - Sedat -