diff --git a/core/os/mutex.h b/core/os/mutex.h
index 4b0d81e0c1..0727a79623 100644
--- a/core/os/mutex.h
+++ b/core/os/mutex.h
@@ -69,7 +69,7 @@ public:
 };
 
 template <typename MutexT>
-class MutexLock {
+class [[nodiscard]] MutexLock {
 	mutable THREADING_NAMESPACE::unique_lock<typename MutexT::StdMutexType> lock;
 
 public:
@@ -114,7 +114,7 @@ public:
 };
 
 template <typename MutexT>
-class MutexLock {
+class [[nodiscard]] MutexLock {
 public:
 	MutexLock(const MutexT &p_mutex) {}