diff --git a/configure.in b/configure.in
index 3f16457..bf994af 100644
--- a/configure.in
+++ b/configure.in
@@ -806,7 +806,7 @@
 libintl.h locale.h ncurses.h poll.h pthread.h \
 signal.h stdarg.h stddef.h stdlib.h stropts.h termios.h thread.h \
 unistd.h utime.h \
-sys/audioio.h sys/file.h sys/lock.h sys/mkdev.h sys/modem.h \
+sys/audioio.h sys/bsdtty.h sys/file.h sys/lock.h sys/mkdev.h sys/modem.h \
 sys/param.h sys/poll.h sys/select.h sys/socket.h sys/time.h sys/times.h \
 sys/un.h sys/utsname.h sys/wait.h pty.h term.h libutil.h \
 sys/resource.h netpacket/packet.h sysexits.h)