diff --git a/libdevcore/FixedHash.h b/libdevcore/FixedHash.h
index 284745c64..41d140cad 100644
--- a/libdevcore/FixedHash.h
+++ b/libdevcore/FixedHash.h
@@ -158,7 +158,7 @@ public:
 		return ret;
 	}
 
-	template <unsigned P, unsigned M> inline FixedHash& shiftBloom(FixedHash<M> const& _h) { return (*this |= _h.nbloom<P, N>()); }
+	template <unsigned P, unsigned M> inline FixedHash& shiftBloom(FixedHash<M> const& _h) { return (*this |= _h.template nbloom<P, N>()); }
 
 	template <unsigned P, unsigned M> inline FixedHash<M> nbloom() const
 	{
diff --git a/libevm/VM.h b/libevm/VM.h
index c8071e346..d5db792f5 100644
--- a/libevm/VM.h
+++ b/libevm/VM.h
@@ -427,9 +427,13 @@ template <class Ext> dev::bytesConstRef dev::eth::VM::go(Ext& _ext, OnOpFunc con
 			break;
 		case Instruction::SIGNEXTEND:
 		{
-			auto k = m_stack[m_stack.size() - 2];
-			m_stack[m_stack.size() - 2] = m_stack.back();
+				unsigned k = m_stack.back();
 			m_stack.pop_back();
+			auto& b = m_stack.back();
+			if (k <= 31)
+				if ((b >> (k * 8)) & 0x80)
+					for (int i = 31; i > k; --i)
+						b |= (u256(0xff) << i);
 			break;
 		}
 		case Instruction::SHA3:
diff --git a/test/vm.cpp b/test/vm.cpp
index ca9ea57ce..d03a4a278 100644
--- a/test/vm.cpp
+++ b/test/vm.cpp
@@ -359,9 +359,9 @@ void FakeExtVM::importExec(mObject& _o)
 	code = &thisTxCode;
 	if (_o["code"].type() == str_type)
 		if (_o["code"].get_str().find_first_of("0x") == 0)
-			thisTxCode = compileLLL(_o["code"].get_str());
-		else
 			thisTxCode = fromHex(_o["code"].get_str().substr(2));
+		else
+			thisTxCode = compileLLL(_o["code"].get_str());
 	else if (_o["code"].type() == array_type)
 		for (auto const& j: _o["code"].get_array())
 			thisTxCode.push_back(toByte(j));