--- a/configure.in
+++ b/configure.in
@@ -17,7 +17,6 @@ ORIG_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -Wall"
 AC_TRY_COMPILE(,[return 0;],AC_MSG_RESULT(yes),AC_MSG_RESULT(no);CFLAGS="$ORIG_CFLAGS")
 AC_CONFIG_HEADER(config.h)
-AC_REQUIRE([AC_HEADER_STDC])
 AC_CHECK_LIB(util, openpty)
 AC_CHECK_FILE("/dev/ptmx", AC_DEFINE(HAVE_DEV_PTMX, 1, Have /dev/ptmx.))
 AC_CHECK_FUNCS(getpt isatty isxdigit openpty putenv regcomp setenv setproctitle setsid sigaction sscanf uname unsetenv vsnprintf waitpid)