diff --git a/libevmjit/Compiler.cpp b/libevmjit/Compiler.cpp
index 3aac68cd8..cfa9349c6 100644
--- a/libevmjit/Compiler.cpp
+++ b/libevmjit/Compiler.cpp
@@ -172,6 +172,7 @@ std::unique_ptr<llvm::Module> Compiler::compile(bytesConstRef bytecode)
 	llvm::Type* mainFuncArgTypes[] = {m_builder.getInt32Ty(), Type::RuntimePtr};	// There must be int in first place because LLVM does not support other signatures
 	auto mainFuncType = llvm::FunctionType::get(Type::MainReturn, mainFuncArgTypes, false);
 	m_mainFunc = llvm::Function::Create(mainFuncType, llvm::Function::ExternalLinkage, "main", module.get());
+	m_mainFunc->arg_begin()->getNextNode()->setName("rt");
 
 	// Create the basic blocks.
 	auto entryBlock = llvm::BasicBlock::Create(m_builder.getContext(), "entry", m_mainFunc);
diff --git a/libevmjit/Runtime.cpp b/libevmjit/Runtime.cpp
index b9dd63ea2..233ce2a39 100644
--- a/libevmjit/Runtime.cpp
+++ b/libevmjit/Runtime.cpp
@@ -27,7 +27,7 @@ llvm::StructType* RuntimeData::getType()
 			Type::BytePtr,
 			Type::BytePtr
 		};
-		type = llvm::StructType::create(elems, "RuntimeData");
+		type = llvm::StructType::create(elems, "Runtime");
 	}
 	return type;
 }