diff --git a/src/corelib/kernel/qcore_mac_p.h b/src/corelib/kernel/qcore_mac_p.h
index 8764171383c..502b9746be4 100644
--- a/src/corelib/kernel/qcore_mac_p.h
+++ b/src/corelib/kernel/qcore_mac_p.h
@@ -112,7 +112,7 @@ protected:
 class QMacAutoReleasePool
 {
 public:
-    Q_CORE_EXPORT QMacAutoReleasePool();
+    Q_NODISCARD_CTOR Q_CORE_EXPORT QMacAutoReleasePool();
     Q_CORE_EXPORT ~QMacAutoReleasePool();
 private:
     Q_DISABLE_COPY(QMacAutoReleasePool)
@@ -123,7 +123,7 @@ private:
 class QMacRootLevelAutoReleasePool
 {
 public:
-    QMacRootLevelAutoReleasePool();
+    Q_NODISCARD_CTOR QMacRootLevelAutoReleasePool();
     ~QMacRootLevelAutoReleasePool();
 private:
     QScopedPointer<QMacAutoReleasePool> pool;