diff --git a/libi2pd/TunnelConfig.cpp b/libi2pd/TunnelConfig.cpp
index c0ebb766..a1b234a1 100644
--- a/libi2pd/TunnelConfig.cpp
+++ b/libi2pd/TunnelConfig.cpp
@@ -152,8 +152,13 @@ namespace tunnel
 	void InitBuildRequestRecordNoiseState (i2p::crypto::NoiseSymmetricState& state)
 	{
 		static const char protocolName[] = "Noise_N_25519_ChaChaPoly_SHA256"; // 31 chars
+		static const uint8_t hh[32] =
+		{
+			0x69, 0x4d, 0x52, 0x44, 0x5a, 0x27, 0xd9, 0xad, 0xfa, 0xd2, 0x9c, 0x76, 0x32, 0x39, 0x5d, 0xc1, 
+			0xe4, 0x35, 0x4c, 0x69, 0xb4, 0xf9, 0x2e, 0xac, 0x8a, 0x1e, 0xe4, 0x6a, 0x9e, 0xd2, 0x15, 0x54
+		}; // SHA256 (protocol_name || 0)
 		memcpy (state.m_CK, protocolName, 32);	// ck = h = protocol_name || 0
-		SHA256 (state.m_CK, 32, state.m_H); // h = SHA256(h);
+		memcpy (state.m_H, hh, 32); // h = SHA256(h)
 	}	
 }
 }
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