-AC_CHECK_TYPE([ssize_t], [int])
-AC_CHECK_TYPE([socklen_t], [int])
+AC_CHECK_TYPE([ssize_t], [],
+ [AC_DEFINE([ssize_t], [int],
+ [Define to `int' if <sys/types.h> does not define])])
+AC_CHECK_TYPE([socklen_t], [],
+ [AC_DEFINE([socklen_t], [int],
+ [Define to `int' if <sys/socket.h> does not define])],
+ [AC_INCLUDES_DEFAULT
+#include <sys/socket.h>
+])