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diff --git a/src/testrand.h b/src/testrand.h
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+++ b/src/testrand.h
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+/**********************************************************************
+ * Copyright (c) 2013, 2014 Pieter Wuille                             *
+ * Distributed under the MIT software license, see the accompanying   *
+ * file COPYING or http://www.opensource.org/licenses/mit-license.php.*
+ **********************************************************************/
+
+#ifndef _SECP256K1_TESTRAND_H_
+#define _SECP256K1_TESTRAND_H_
+
+#if defined HAVE_CONFIG_H
+#include "libsecp256k1-config.h"
+#endif
+
+/** Seed the pseudorandom number generator. */
+SECP256K1_INLINE static void secp256k1_rand_seed(uint64_t v);
+
+/** Generate a pseudorandom 32-bit number. */
+static uint32_t secp256k1_rand32(void);
+
+/** Generate a pseudorandom 32-byte array. */
+static void secp256k1_rand256(unsigned char *b32);
+
+/** Generate a pseudorandom 32-byte array with long sequences of zero and one bits. */
+static void secp256k1_rand256_test(unsigned char *b32);
+
+#endif