diff --git a/libevmjit-cpp/JitVM.cpp b/libevmjit-cpp/JitVM.cpp
index 02aa7dc64c..0a591f09b7 100644
--- a/libevmjit-cpp/JitVM.cpp
+++ b/libevmjit-cpp/JitVM.cpp
@@ -13,7 +13,7 @@ bytesConstRef JitVM::go(ExtVMFace& _ext, OnOpFunc const&, uint64_t)
 {
 	using namespace jit;
 
-	RuntimeData data = {};
+	RuntimeData data{{},nullptr,nullptr};
 
 #define set(INDEX, VALUE) data.elems[INDEX] = eth2llvm(VALUE)
 	set(RuntimeData::Gas, m_gas);
@@ -64,5 +64,9 @@ namespace
 {
 	// MSVS linker ignores export symbols in Env.cpp if nothing point at least one of them
 	extern "C" void env_sload();
-	void linkerWorkaround() { env_sload(); }
+	void linkerWorkaround() 
+	{ 
+		env_sload();
+		(void)linkerWorkaround; // suppress unused function warning from GCC
+	}
 }
diff --git a/libevmjit/Compiler.cpp b/libevmjit/Compiler.cpp
index 32f1579ee1..4bbebe9ea6 100644
--- a/libevmjit/Compiler.cpp
+++ b/libevmjit/Compiler.cpp
@@ -810,7 +810,7 @@ void Compiler::compileBasicBlock(BasicBlock& _basicBlock, bytes const& _bytecode
 			// This will commit the current cost block
 			_gasMeter.countLogData(numBytes);
 
-			std::array<llvm::Value*, 4> topics{};
+			std::array<llvm::Value*, 4> topics{{}};
 			auto numTopics = static_cast<size_t>(inst) - static_cast<size_t>(Instruction::LOG0);
 			for (size_t i = 0; i < numTopics; ++i)
 				topics[i] = stack.pop();