diff --git a/src/corelib/kernel/qcore_mac_p.h b/src/corelib/kernel/qcore_mac_p.h
index 3fd6e13df35..f69eb693a35 100644
--- a/src/corelib/kernel/qcore_mac_p.h
+++ b/src/corelib/kernel/qcore_mac_p.h
@@ -115,7 +115,7 @@ protected:
 class QMacAutoReleasePool
 {
 public:
-    Q_CORE_EXPORT QMacAutoReleasePool();
+    Q_NODISCARD_CTOR Q_CORE_EXPORT QMacAutoReleasePool();
     Q_CORE_EXPORT ~QMacAutoReleasePool();
 private:
     Q_DISABLE_COPY(QMacAutoReleasePool)
@@ -126,7 +126,7 @@ private:
 class QMacRootLevelAutoReleasePool
 {
 public:
-    QMacRootLevelAutoReleasePool();
+    Q_NODISCARD_CTOR QMacRootLevelAutoReleasePool();
     ~QMacRootLevelAutoReleasePool();
 private:
     QScopedPointer<QMacAutoReleasePool> pool;