diff --git a/libdevcore/CommonData.cpp b/libdevcore/CommonData.cpp
index 7a6e7ff55..3e5231b6e 100644
--- a/libdevcore/CommonData.cpp
+++ b/libdevcore/CommonData.cpp
@@ -20,6 +20,7 @@
  */
 
 #include "CommonData.h"
+#include <random>
 #include <boost/random/uniform_int_distribution.hpp>
 #include "Exceptions.h"
 #include "Log.h"
diff --git a/libdevcore/FixedHash.h b/libdevcore/FixedHash.h
index 973bc174e..8beb3bec7 100644
--- a/libdevcore/FixedHash.h
+++ b/libdevcore/FixedHash.h
@@ -149,18 +149,16 @@ public:
 	/// @returns a constant reference to the object's data as an STL array.
 	std::array<byte, N> const& asArray() const { return m_data; }
 
-	/// @returns a randomly-valued hash
+	/// Populate with random data.
 	template <class Engine>
-	static FixedHash random(Engine& _eng)
+	void randomize(Engine& _eng)
 	{
-		FixedHash ret;
-		for (auto& i: ret.m_data)
+		for (auto& i: m_data)
 			i = (uint8_t)boost::random::uniform_int_distribution<uint16_t>(0, 255)(_eng);
-		return ret;
 	}
 
 	/// @returns a random valued object.
-	static FixedHash random() { return random(s_fixedHashEngine); }
+	static FixedHash random() { FixedHash ret; ret.randomize(s_fixedHashEngine); return ret; }
 
 	struct hash
 	{
@@ -293,7 +291,7 @@ public:
 	bytesConstRef ref() const { return FixedHash<T>::ref(); }
 	byte const* data() const { return FixedHash<T>::data(); }
 
-	static SecureFixedHash<T> random() { SecureFixedHash<T> ret; ret.FixedHash<T>::ref().randomize(); return ret; }
+	static SecureFixedHash<T> random() { SecureFixedHash<T> ret; ret.randomize(s_fixedHashEngine); return ret; }
 	using FixedHash<T>::firstBitSet;
 
 	void clear() { ref().cleanse(); }
diff --git a/libdevcore/vector_ref.h b/libdevcore/vector_ref.h
index b5d0453a6..6fb9ad3b5 100644
--- a/libdevcore/vector_ref.h
+++ b/libdevcore/vector_ref.h
@@ -5,16 +5,10 @@
 #include <type_traits>
 #include <vector>
 #include <string>
-#include <random>
-#include <boost/random/random_device.hpp>
-#include <boost/random/uniform_int_distribution.hpp>
 
 namespace dev
 {
 
-static unsigned char s_cleanseCounter = 0;
-static boost::random_device s_vectorRefEngine;
-
 /**
  * A modifiable reference to an existing object or vector in memory.
  */
@@ -71,20 +65,11 @@ public:
 	void copyTo(vector_ref<typename std::remove_const<_T>::type> _t) const { if (overlapsWith(_t)) memmove(_t.data(), m_data, std::min(_t.size(), m_count) * sizeof(_T)); else memcpy(_t.data(), m_data, std::min(_t.size(), m_count) * sizeof(_T)); }
 	/// Copies the contents of this vector_ref to the contents of @a _t, and zeros further trailing elements in @a _t.
 	void populate(vector_ref<typename std::remove_const<_T>::type> _t) const { copyTo(_t); memset(_t.data() + m_count, 0, std::max(_t.size(), m_count) - m_count); }
-	/// Populate with random data.
-	template <class Engine>
-	void randomize(Engine& _eng)
-	{
-		uint8_t* e = (uint8_t*)end();
-		for (uint8_t* i = (uint8_t*)begin(); i != e; ++i)
-			*i = (uint8_t)boost::random::uniform_int_distribution<uint16_t>(0, 255)(_eng);
-	}
-	/// @returns a random valued object.
-	void randomize() { randomize(s_vectorRefEngine); }
 	/// Securely overwrite the memory.
 	/// @note adapted from OpenSSL's implementation.
 	void cleanse()
 	{
+		static unsigned char s_cleanseCounter = 0;
 		uint8_t* p = (uint8_t*)begin();
 		size_t const len = (uint8_t*)end() - p;
 		size_t loop = len;
diff --git a/libethcore/EthashCPUMiner.cpp b/libethcore/EthashCPUMiner.cpp
index 0c645c831..6c7097605 100644
--- a/libethcore/EthashCPUMiner.cpp
+++ b/libethcore/EthashCPUMiner.cpp
@@ -25,6 +25,7 @@
 #include <thread>
 #include <chrono>
 #include <boost/algorithm/string.hpp>
+#include <random>
 #if ETH_CPUID || !ETH_TRUE
 #define HAVE_STDINT_H
 #include <libcpuid/libcpuid.h>
@@ -78,7 +79,7 @@ void EthashCPUMiner::workLoop()
 	auto tid = std::this_thread::get_id();
 	static std::mt19937_64 s_eng((time(0) + std::hash<decltype(tid)>()(tid)));
 
-	uint64_t tryNonce = (uint64_t)(u64)Nonce::random(s_eng);
+	uint64_t tryNonce = s_eng();
 	ethash_return_value ethashReturn;
 
 	WorkPackage w = work();