diff --git a/src/tim/vx/compile_option.cc b/src/tim/vx/compile_option.cc
index 24a1e35..c0d6198 100644
--- a/src/tim/vx/compile_option.cc
+++ b/src/tim/vx/compile_option.cc
@@ -33,7 +33,7 @@ struct CompileOptionImpl {
   // string: readable name; bool: setup or not; bool: value if setup; bool: default value if not setup;
   using RelaxModeType = std::tuple<std::string, bool, bool, bool>;
   CompileOptionImpl() {
-    relax_mode_ = {std::string("RelaxMode"), false, false, false};
+    relax_mode_ = RelaxModeType(std::string("RelaxMode"), false, false, false);
   }
 
   bool RelaxMode() const {
@@ -57,4 +57,4 @@ bool CompileOption::setRelaxMode(bool enable) {
   return this->impl_->RelaxMode() = enable;
 }
 }  // namespace vx
-}  // namespace tim
\ No newline at end of file
+}  // namespace tim