diff --git a/include/evmjit/JIT.h b/include/evmjit/JIT.h
index 446dd9e56..c9ddde705 100644
--- a/include/evmjit/JIT.h
+++ b/include/evmjit/JIT.h
@@ -28,8 +28,8 @@ public:
 private:
 	friend class dev::eth::jit::ExecutionEngine;
 
-	static void* getCode(h256 _codeHash);
-	static void mapCode(h256 _codeHash, void* _funcAddr);
+	static uint64_t getCode(h256 _codeHash);
+	static void mapCode(h256 _codeHash, uint64_t _funcAddr);
 };
 
 }
diff --git a/libevmjit/ExecutionEngine.cpp b/libevmjit/ExecutionEngine.cpp
index 08ca403b5..e5abb36b3 100644
--- a/libevmjit/ExecutionEngine.cpp
+++ b/libevmjit/ExecutionEngine.cpp
@@ -183,7 +183,7 @@ ReturnCode ExecutionEngine::run(RuntimeData* _data, Env* _env)
 		entryFuncPtr = (EntryFuncPtr)ee->getFunctionAddress(mainFuncName);
 		if (!CHECK(entryFuncPtr))
 			return ReturnCode::LLVMLinkError;
-		JIT::mapCode(_data->codeHash, (void*)entryFuncPtr); // FIXME: Remove cast
+		JIT::mapCode(_data->codeHash, (uint64_t)entryFuncPtr); // FIXME: Remove cast
 	}
 
 	listener->stateChanged(ExecState::Execution);
diff --git a/libevmjit/JIT.cpp b/libevmjit/JIT.cpp
index 9774c7396..8617fab6d 100644
--- a/libevmjit/JIT.cpp
+++ b/libevmjit/JIT.cpp
@@ -12,7 +12,7 @@ namespace
 class JITImpl: JIT
 {
 public:
-	std::unordered_map<h256, void*> codeMap;
+	std::unordered_map<h256, uint64_t> codeMap;
 
 	static JITImpl& instance()
 	{
@@ -28,16 +28,16 @@ bool JIT::isCodeReady(h256 _codeHash)
 	return JITImpl::instance().codeMap.count(_codeHash) != 0;
 }
 
-void* JIT::getCode(h256 _codeHash)
+uint64_t JIT::getCode(h256 _codeHash)
 {
 	auto& codeMap = JITImpl::instance().codeMap;
 	auto it = codeMap.find(_codeHash);
 	if (it != codeMap.end())
 		return it->second;
-	return nullptr;
+	return 0;
 }
 
-void JIT::mapCode(h256 _codeHash, void* _funcAddr)
+void JIT::mapCode(h256 _codeHash, uint64_t _funcAddr)
 {
 	JITImpl::instance().codeMap.insert(std::make_pair(_codeHash, _funcAddr));
 }