diff --git a/libethcore/Ethash.cpp b/libethcore/Ethash.cpp
index 163e1140b..db1a17b0a 100644
--- a/libethcore/Ethash.cpp
+++ b/libethcore/Ethash.cpp
@@ -140,7 +140,7 @@ void Ethash::CPUMiner::workLoop()
 	unsigned hashCount = 1;
 	for (; !shouldStop(); tryNonce++, hashCount++)
 	{
-		ethashReturn = ethash_full_compute(dag->full, EthashAux::bytesToEthash256T(w.headerHash.data()), tryNonce);
+		ethashReturn = ethash_full_compute(dag->full, *(ethash_h256_t*)w.headerHash.data(), tryNonce);
 		h256 value = h256((uint8_t*)&ethashReturn.result, h256::ConstructFromPointer);
 		if (value <= boundary && submitProof(Solution{(Nonce)(u64)tryNonce, h256((uint8_t*)&ethashReturn.mix_hash, h256::ConstructFromPointer)}))
 			break;
diff --git a/libethcore/EthashAux.cpp b/libethcore/EthashAux.cpp
index 0f4591d7d..8851f4c7b 100644
--- a/libethcore/EthashAux.cpp
+++ b/libethcore/EthashAux.cpp
@@ -41,20 +41,12 @@ using namespace chrono;
 using namespace dev;
 using namespace eth;
 
-
 EthashAux* dev::eth::EthashAux::s_this = nullptr;
 
 EthashAux::~EthashAux()
 {
 }
 
-ethash_h256_t EthashAux::bytesToEthash256T(uint8_t const* _bytes)
-{
-	ethash_h256_t ret;
-	memcpy(&ret, _bytes, 32);
-	return ret;
-}
-
 uint64_t EthashAux::cacheSize(BlockInfo const& _header)
 {
 	return ethash_get_cachesize((uint64_t)_header.number);
@@ -155,7 +147,7 @@ EthashAux::FullType EthashAux::full(uint64_t _blockNumber)
 
 Ethash::Result EthashAux::FullAllocation::compute(h256 const& _headerHash, Nonce const& _nonce) const
 {
-	ethash_return_value_t r = ethash_full_compute(full, bytesToEthash256T(_headerHash.data()), (uint64_t)(u64)_nonce);
+	ethash_return_value_t r = ethash_full_compute(full, *(ethash_h256_t*)_headerHash.data(), (uint64_t)(u64)_nonce);
 	if (!r.success)
 		BOOST_THROW_EXCEPTION(DAGCreationFailure());
 	return Ethash::Result{h256((uint8_t*)&r.result, h256::ConstructFromPointer), h256((uint8_t*)&r.mix_hash, h256::ConstructFromPointer)};
@@ -163,7 +155,7 @@ Ethash::Result EthashAux::FullAllocation::compute(h256 const& _headerHash, Nonce
 
 Ethash::Result EthashAux::LightAllocation::compute(h256 const& _headerHash, Nonce const& _nonce) const
 {
-	ethash_return_value r = ethash_light_compute(light, bytesToEthash256T(_headerHash.data()), (uint64_t)(u64)_nonce);
+	ethash_return_value r = ethash_light_compute(light, *(ethash_h256_t*)_headerHash.data(), (uint64_t)(u64)_nonce);
 	if (!r.success)
 		BOOST_THROW_EXCEPTION(DAGCreationFailure());
 	return Ethash::Result{h256((uint8_t*)&r.result, h256::ConstructFromPointer), h256((uint8_t*)&r.mix_hash, h256::ConstructFromPointer)};
diff --git a/libethcore/EthashAux.h b/libethcore/EthashAux.h
index 6422f0db9..3a5abf3e3 100644
--- a/libethcore/EthashAux.h
+++ b/libethcore/EthashAux.h
@@ -58,7 +58,6 @@ public:
 	using FullType = std::shared_ptr<FullAllocation>;
 
 	static h256 seedHash(unsigned _number);
-	static ethash_h256_t bytesToEthash256T(uint8_t const* _bytes);
 	static uint64_t cacheSize(BlockInfo const& _header);
 
 	static LightType light(BlockInfo const& _header);