diff --git a/scripts/configure.in b/scripts/configure.in
index 312a779f..f5003a9c 100644
--- a/scripts/configure.in
+++ b/scripts/configure.in
@@ -183,6 +183,12 @@ AC_CHECK_HEADERS(termios.h)
 dnl Check for <sys/ioctl.h>
 AC_CHECK_HEADERS(sys/ioctl.h)
 
+dnl Check for <sys/ioctl_compat.h>
+AC_CHECK_HEADERS(sys/ioctl_compat.h)
+
+dnl Check for <sgtty.h>
+AC_CHECK_HEADERS(sgtty.h)
+
 AC_STRUCT_DIRENT_D_TYPE
 
 dnl Check for va_copy