--- dump-0.4b34/configure.in.check-systypes	2003-04-10 10:25:21.000000000 +0200
+++ dump-0.4b34/configure.in	2004-01-05 20:02:40.000000000 +0100
@@ -494,6 +494,7 @@ fi
 dnl
 dnl Check for types
 dnl
+AC_CHECK_HEADERS(sys/types.h)
 AC_CHECK_TYPE(quad_t, int64_t)
 AC_CHECK_TYPE(u_quad_t, uint64_t)