diff --git a/gost/cuda_gosthash.cu b/gost/cuda_gosthash.cu
index c30e44e..3cdc09a 100644
--- a/gost/cuda_gosthash.cu
+++ b/gost/cuda_gosthash.cu
@@ -843,12 +843,11 @@ void GOST_g_0(uint64_t* h, uint64_t* const M)
 __device__
 void GOST_g_0_0(uint64_t* h, uint64_t* const M) // input h assumed zero, for iv 512
 {
-	uint64_t K0[8];
 	#pragma unroll
-	for(int i = 0; i < 8; i++) K0[i] = 0x74a5d4ce2efc83b3; // GOST_F(0)
+	for(int i = 0; i < 8; i++) h[i] = 0x74a5d4ce2efc83b3; // GOST_F(0)
 
 	uint64_t t[8];
-	GOST_E(K0, M, t);
+	GOST_E(h, M, t);
 
 	GOST_Xor512 (h, t, M); // h = t ^ M 
 }
@@ -868,9 +867,9 @@ void gostd_gpu_hash_80(const uint32_t threads, const uint32_t startNonce, uint32
 		#pragma unroll	
 		for (int i = 0; i < 8; i++) block2[i] = c_header2[i];
 		((uint32_t *)block2)[15] = cuda_swab32 (nonce); // change nonce
-		uint64_t __align__(8) hash1[8] = { 0 }; // iv for 512
+		uint64_t __align__(8) hash1[8];
 		// second block	
-		GOST_g_0_0 (hash1, block2); // zero iv assumed
+		GOST_g_0_0 (hash1, block2); // zero iv for 512 assumed
 		N[7] = 0x0002000000000000; // 512 
 		// first block
 		GOST_g_N(hash1, c_header1 + 2, N);