1 files changed, 5 insertions, 4 deletions
diff --git a/src/random.cpp b/src/random.cpp
index fee6c2d92a..503d5b3636 100644
--- a/src/random.cpp
+++ b/src/random.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -12,6 +12,7 @@
 #include <wincrypt.h>
 #endif
 #include <logging.h>  // for LogPrint()
+#include <sync.h>     // for WAIT_LOCK
 #include <utiltime.h> // for GetTime()
 
 #include <stdlib.h>
@@ -295,7 +296,7 @@ void RandAddSeedSleep()
 }
 
 
-static std::mutex cs_rng_state;
+static Mutex cs_rng_state;
 static unsigned char rng_state[32] = {0};
 static uint64_t rng_counter = 0;
 
@@ -305,7 +306,7 @@ static void AddDataToRng(void* data, size_t len) {
     hasher.Write((const unsigned char*)data, len);
     unsigned char buf[64];
     {
-        std::unique_lock<std::mutex> lock(cs_rng_state);
+        WAIT_LOCK(cs_rng_state, lock);
         hasher.Write(rng_state, sizeof(rng_state));
         hasher.Write((const unsigned char*)&rng_counter, sizeof(rng_counter));
         ++rng_counter;
@@ -337,7 +338,7 @@ void GetStrongRandBytes(unsigned char* out, int num)
 
     // Combine with and update state
     {
-        std::unique_lock<std::mutex> lock(cs_rng_state);
+        WAIT_LOCK(cs_rng_state, lock);
         hasher.Write(rng_state, sizeof(rng_state));
         hasher.Write((const unsigned char*)&rng_counter, sizeof(rng_counter));
         ++rng_counter;