diff --git a/src/corelib/thread/qfuturesynchronizer.h b/src/corelib/thread/qfuturesynchronizer.h
index 368ef0c81b..a996362bfd 100644
--- a/src/corelib/thread/qfuturesynchronizer.h
+++ b/src/corelib/thread/qfuturesynchronizer.h
@@ -18,7 +18,7 @@ class QFutureSynchronizer
 
 public:
     Q_NODISCARD_CTOR QFutureSynchronizer() : m_cancelOnWait(false) { }
-    Q_NODISCARD_CTOR
+    Q_NODISCARD_CTOR_X("Use future.waitForFinished() instead.")
     explicit QFutureSynchronizer(QFuture<T> future)
         : m_cancelOnWait(false)
     { addFuture(std::move(future)); }