diff --git a/source/include/Utils/LoggerUtils.h b/source/include/Utils/LoggerUtils.h
index f0e8cbe4c..0655ba5f4 100644
--- a/source/include/Utils/LoggerUtils.h
+++ b/source/include/Utils/LoggerUtils.h
@@ -171,7 +171,7 @@ class MAA_UTILS_API LogStream
     std::ofstream& stream_;
     const level lv_ = level::fatal;
     const bool stdout_ = false;
-    const StringConverter string_converter_;
+    const StringConverter string_converter_ {};
 
     separator sep_ = separator::space;
     std::stringstream buffer_;