diff --git a/src/corelib/thread/qmutex.h b/src/corelib/thread/qmutex.h
index 6081bfe4cc0..a96db102d2a 100644
--- a/src/corelib/thread/qmutex.h
+++ b/src/corelib/thread/qmutex.h
@@ -9,6 +9,8 @@
 #include <QtCore/qdeadlinetimer.h>
 #include <QtCore/qtsan_impl.h>
 
+#include <chrono>
+
 QT_BEGIN_NAMESPACE
 
 #if QT_CONFIG(thread) || defined(Q_QDOC)