diff --git a/src/target/llvm/codegen_amdgpu.cc b/src/target/llvm/codegen_amdgpu.cc
index 9cf4d539c1ad9..961ff418e2a53 100644
--- a/src/target/llvm/codegen_amdgpu.cc
+++ b/src/target/llvm/codegen_amdgpu.cc
@@ -236,7 +236,7 @@ runtime::Module BuildAMDGPU(Array<LoweredFunc> funcs, std::string target) {
     llvm::SMDiagnostic err;
     std::unique_ptr<llvm::Module> mlib = llvm::parseIRFile(path, err, *ctx);
     if (mlib.get() == nullptr) {
-      std::string msg = err.getMessage();
+      std::string msg(err.getMessage());
       LOG(FATAL) << "Fail to load bitcode file " << path << "\n"
                  << "line " << err.getLineNo() << ":" << msg;
     }
diff --git a/src/target/llvm/codegen_nvptx.cc b/src/target/llvm/codegen_nvptx.cc
index 555adc9d26ed0..821232ded1705 100644
--- a/src/target/llvm/codegen_nvptx.cc
+++ b/src/target/llvm/codegen_nvptx.cc
@@ -215,7 +215,7 @@ runtime::Module BuildNVPTX(Array<LoweredFunc> funcs, std::string target) {
       llvm::SMDiagnostic err;
       std::unique_ptr<llvm::Module> mlib = llvm::parseIRFile(path, err, *ctx);
       if (mlib.get() == nullptr) {
-        std::string msg = err.getMessage();
+        std::string msg(err.getMessage());
         LOG(FATAL) << "Fail to load bitcode file " << path << "\n"
                    << "line " << err.getLineNo() << ":" << msg;
       }
diff --git a/src/target/llvm/llvm_module.cc b/src/target/llvm/llvm_module.cc
index 30755fcfc1253..2e04920d866b6 100644
--- a/src/target/llvm/llvm_module.cc
+++ b/src/target/llvm/llvm_module.cc
@@ -239,7 +239,7 @@ class LLVMModuleNode final : public runtime::ModuleNode {
     if (mtarget != nullptr) {
       llvm::MDString* pstr = llvm::dyn_cast<llvm::MDString>(mtarget);
       CHECK(pstr != nullptr);
-      target_ = pstr->getString();
+      target_ = pstr->getString().str();
     } else {
       std::ostringstream os;
       os << "llvm -target " << module_->getTargetTriple();