1diff --git a/gmp-h.in b/gmp-h.in
2index 7deb67a..240d663 100644
3--- a/gmp-h.in
4+++ b/gmp-h.in
5@@ -46,13 +46,11 @@ along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
6 #ifndef __GNU_MP__
7 #define __GNU_MP__ 5
8
9-#define __need_size_t /* tell gcc stddef.h we only want size_t */
10 #if defined (__cplusplus)
11 #include <cstddef> /* for size_t */
12 #else
13 #include <stddef.h> /* for size_t */
14 #endif
15-#undef __need_size_t
16
17 /* Instantiated by configure. */
18 #if ! defined (__GMP_WITHIN_CONFIGURE)