diff --git a/include/FramelessHelper/Core/private/sysapiloader_p.h b/include/FramelessHelper/Core/private/sysapiloader_p.h
index 1a2e9f67..3a1b4afb 100644
--- a/include/FramelessHelper/Core/private/sysapiloader_p.h
+++ b/include/FramelessHelper/Core/private/sysapiloader_p.h
@@ -56,7 +56,7 @@ class FRAMELESSHELPER_CORE_API SysApiLoader : public QObject
     }
 
 private:
-    static inline QMutex m_mutex;
+    static inline QMutex m_mutex{};
     static inline QHash<QString, std::optional<QFunctionPointer>> m_functionCache = {};
 };