The afile.h include has been so named for some time but the corresponding #define has not been changed from WAV_H - not that it matters much of course.
Jan Index: afile.h =================================================================== RCS file: /cvs/src/usr.bin/aucat/afile.h,v retrieving revision 1.1 diff -u -p -r1.1 afile.h --- afile.h 21 Jan 2015 08:43:55 -0000 1.1 +++ afile.h 9 Feb 2020 17:42:02 -0000 @@ -14,8 +14,8 @@ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ -#ifndef WAV_H -#define WAV_H +#ifndef AFILE_H +#define AFILE_H #include <sys/types.h> #include "dsp.h" @@ -52,4 +52,4 @@ size_t afile_write(struct afile *, void int afile_seek(struct afile *, off_t); void afile_close(struct afile *); -#endif /* !defined(WAV_H) */ +#endif /* !defined(AFILE_H) */