diff --git a/src/corelib/CMakeLists.txt b/src/corelib/CMakeLists.txt
index c683bb46dd7..e5aadde825a 100644
--- a/src/corelib/CMakeLists.txt
+++ b/src/corelib/CMakeLists.txt
@@ -149,7 +149,7 @@ qt_internal_add_module(Core
         kernel/qsystemerror.cpp kernel/qsystemerror_p.h
         kernel/qsystemsemaphore.cpp kernel/qsystemsemaphore.h kernel/qsystemsemaphore_p.h
         kernel/qtestsupport_core.cpp kernel/qtestsupport_core.h
-        kernel/qtimer.cpp kernel/qtimer.h
+        kernel/qtimer.cpp kernel/qtimer.h kernel/qtimer_p.h
         kernel/qtranslator.cpp kernel/qtranslator.h kernel/qtranslator_p.h
         kernel/qvariant.cpp kernel/qvariant.h kernel/qvariant_p.h
         kernel/qvariantmap.h kernel/qvarianthash.h kernel/qvariantlist.h
diff --git a/src/corelib/kernel/qtimer.cpp b/src/corelib/kernel/qtimer.cpp
index 376b13e9f29..8a94603488d 100644
--- a/src/corelib/kernel/qtimer.cpp
+++ b/src/corelib/kernel/qtimer.cpp
@@ -3,6 +3,8 @@
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
 #include "qtimer.h"
+#include "qtimer_p.h"
+
 #include "qabstracteventdispatcher.h"
 #include "qcoreapplication.h"
 #include "qobject_p.h"
@@ -12,23 +14,6 @@
 
 QT_BEGIN_NAMESPACE
 
-static constexpr int INV_TIMER = -1;                // invalid timer id
-
-class QTimerPrivate : public QObjectPrivate
-{
-    Q_DECLARE_PUBLIC(QTimer)
-public:
-    void setInterval(int msec) { q_func()->setInterval(msec); }
-    bool isActiveActualCalculation() const { return id >= 0; }
-
-    int id = INV_TIMER;
-    Q_OBJECT_COMPAT_PROPERTY_WITH_ARGS(QTimerPrivate, int, inter, &QTimerPrivate::setInterval, 0)
-    Q_OBJECT_BINDABLE_PROPERTY_WITH_ARGS(QTimerPrivate, bool, single, false)
-    Q_OBJECT_BINDABLE_PROPERTY_WITH_ARGS(QTimerPrivate, Qt::TimerType, type, Qt::CoarseTimer)
-    Q_OBJECT_COMPUTED_PROPERTY(QTimerPrivate, bool, isActiveData,
-                               &QTimerPrivate::isActiveActualCalculation)
-};
-
 /*!
     \class QTimer
     \inmodule QtCore
@@ -139,7 +124,7 @@ QTimer::QTimer(QObject *parent)
 
 QTimer::~QTimer()
 {
-    if (d_func()->id != INV_TIMER)                        // stop running timer
+    if (d_func()->id != QTimerPrivate::INV_TIMER) // stop running timer
         stop();
 }
 
@@ -200,7 +185,7 @@ int QTimer::timerId() const
 void QTimer::start()
 {
     Q_D(QTimer);
-    if (d->id != INV_TIMER)                        // stop running timer
+    if (d->id != QTimerPrivate::INV_TIMER) // stop running timer
         stop();
     d->id = QObject::startTimer(d->inter, d->type);
     d->isActiveData.notify();
@@ -239,9 +224,9 @@ void QTimer::start(int msec)
 void QTimer::stop()
 {
     Q_D(QTimer);
-    if (d->id != INV_TIMER) {
+    if (d->id != QTimerPrivate::INV_TIMER) {
         QObject::killTimer(d->id);
-        d->id = INV_TIMER;
+        d->id = QTimerPrivate::INV_TIMER;
         d->isActiveData.notify();
     }
 }
@@ -721,7 +706,7 @@ void QTimer::setInterval(int msec)
     Q_D(QTimer);
     const bool intervalChanged = msec != d->inter;
     d->inter.setValue(msec);
-    if (d->id != INV_TIMER) {                        // create new timer
+    if (d->id != QTimerPrivate::INV_TIMER) { // create new timer
         QObject::killTimer(d->id);                        // restart timer
         d->id = QObject::startTimer(msec, d->type);
         // No need to call markDirty() for d->isActiveData here,
@@ -755,7 +740,7 @@ QBindable<int> QTimer::bindableInterval()
 int QTimer::remainingTime() const
 {
     Q_D(const QTimer);
-    if (d->id != INV_TIMER) {
+    if (d->id != QTimerPrivate::INV_TIMER) {
         return QAbstractEventDispatcher::instance()->remainingTime(d->id);
     }
 
diff --git a/src/corelib/kernel/qtimer_p.h b/src/corelib/kernel/qtimer_p.h
new file mode 100644
index 00000000000..f283a264fa0
--- /dev/null
+++ b/src/corelib/kernel/qtimer_p.h
@@ -0,0 +1,39 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+#ifndef QTIMER_P_H
+#define QTIMER_P_H
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of the Qt translation tools.  This header file may change from version
+// to version without notice, or even be removed.
+//
+// We mean it.
+//
+#include "qobject_p.h"
+#include "qproperty_p.h"
+#include "qtimer.h"
+
+QT_BEGIN_NAMESPACE
+
+class QTimerPrivate : public QObjectPrivate
+{
+    Q_DECLARE_PUBLIC(QTimer)
+public:
+    static constexpr int INV_TIMER = -1; // invalid timer id
+
+    void setInterval(int msec) { q_func()->setInterval(msec); }
+    bool isActiveActualCalculation() const { return id >= 0; }
+
+    int id = INV_TIMER;
+    Q_OBJECT_COMPAT_PROPERTY_WITH_ARGS(QTimerPrivate, int, inter, &QTimerPrivate::setInterval, 0)
+    Q_OBJECT_BINDABLE_PROPERTY_WITH_ARGS(QTimerPrivate, bool, single, false)
+    Q_OBJECT_BINDABLE_PROPERTY_WITH_ARGS(QTimerPrivate, Qt::TimerType, type, Qt::CoarseTimer)
+    Q_OBJECT_COMPUTED_PROPERTY(QTimerPrivate, bool, isActiveData,
+                               &QTimerPrivate::isActiveActualCalculation)
+};
+
+QT_END_NAMESPACE
+#endif // QTIMER_P_H