From ac274bff23d26c03057f202be391e565bc48a2c2 Mon Sep 17 00:00:00 2001
From: evoskuil <eric@voskuil.org>
Date: Thu, 8 May 2014 10:28:20 -0700
Subject: [PATCH] Fix x64 gmp init on platforms that define UL as 32 bits.

---
 src/field_gmp_impl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/field_gmp_impl.h b/src/field_gmp_impl.h
index 880c5a7265..3dbd7604b5 100644
--- a/src/field_gmp_impl.h
+++ b/src/field_gmp_impl.h
@@ -18,7 +18,7 @@ void static secp256k1_fe_inner_start(void) {
     for (int i=0; i<(33+GMP_NUMB_BITS-1)/GMP_NUMB_BITS; i++)
         secp256k1_field_pc[i] = 0;
     secp256k1_field_pc[0] += 0x3D1UL;
-    secp256k1_field_pc[32/GMP_NUMB_BITS] += (1UL << (32 % GMP_NUMB_BITS));
+    secp256k1_field_pc[32/GMP_NUMB_BITS] += (((mp_limb_t)1) << (32 % GMP_NUMB_BITS));
     for (int i=0; i<FIELD_LIMBS; i++) {
         secp256k1_field_p[i] = 0;
     }