diff --git a/src/corelib/io/qfilesystemwatcher_polling.cpp b/src/corelib/io/qfilesystemwatcher_polling.cpp
index 6ec8b17ea4..a74205b713 100644
--- a/src/corelib/io/qfilesystemwatcher_polling.cpp
+++ b/src/corelib/io/qfilesystemwatcher_polling.cpp
@@ -2,11 +2,18 @@
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
 #include "qfilesystemwatcher_polling_p.h"
+
 #include <QtCore/qscopeguard.h>
 #include <QtCore/qtimer.h>
 
+#include <chrono>
+
+using namespace std::chrono_literals;
+
 QT_BEGIN_NAMESPACE
 
+static constexpr auto PollingInterval = 1s;
+
 QPollingFileSystemWatcherEngine::QPollingFileSystemWatcherEngine(QObject *parent)
     : QFileSystemWatcherEngine(parent)
 {
diff --git a/src/corelib/io/qfilesystemwatcher_polling_p.h b/src/corelib/io/qfilesystemwatcher_polling_p.h
index b1100b061a..b65ff05575 100644
--- a/src/corelib/io/qfilesystemwatcher_polling_p.h
+++ b/src/corelib/io/qfilesystemwatcher_polling_p.h
@@ -27,8 +27,6 @@
 QT_REQUIRE_CONFIG(filesystemwatcher);
 QT_BEGIN_NAMESPACE
 
-enum { PollingInterval = 1000 };
-
 class QPollingFileSystemWatcherEngine : public QFileSystemWatcherEngine
 {
     Q_OBJECT