Hi! FYI, I have managed to build wireguard by removing the #define. https://git.zx2c4.com/wireguard-linux-compat/tree/src/compat/compat.h#n859 I am not a C dev, so I am not sure what the implications are but I understand that it's a kind of debugging structure and it's also not defined on CENTOS8 so, I guess it should be OK. Cheers! -- Faustin