diff --git a/src/corelib/io/qfilesystemwatcher_win.cpp b/src/corelib/io/qfilesystemwatcher_win.cpp
index 410753868e..582aa3bbe9 100644
--- a/src/corelib/io/qfilesystemwatcher_win.cpp
+++ b/src/corelib/io/qfilesystemwatcher_win.cpp
@@ -165,7 +165,7 @@ QStringList QWindowsFileSystemWatcherEngine::addPaths(const QStringList &paths,
             // now look for a thread to insert
             bool found = false;
             foreach(QWindowsFileSystemWatcherEngineThread *thread, threads) {
-                QMutexLocker(&(thread->mutex));
+                QMutexLocker locker(&(thread->mutex));
                 if (thread->handles.count() < MAXIMUM_WAIT_OBJECTS) {
                     DEBUG() << "Added handle" << handle.handle << "for" << absolutePath << "to watch" << fileInfo.absoluteFilePath()
                             << "to existing thread " << thread;
diff --git a/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp b/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp
index aeb4f903db..2d75e1720a 100644
--- a/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp
+++ b/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp
@@ -737,7 +737,7 @@ inline QUrl QWindowsFileDialogSharedData::directory() const
 
 inline void QWindowsFileDialogSharedData::setDirectory(const QUrl &d)
 {
-    QMutexLocker (&m_data->mutex);
+    QMutexLocker locker(&m_data->mutex);
     m_data->directory = d;
 }
 
@@ -751,7 +751,7 @@ inline QString QWindowsFileDialogSharedData::selectedNameFilter() const
 
 inline void QWindowsFileDialogSharedData::setSelectedNameFilter(const QString &f)
 {
-    QMutexLocker (&m_data->mutex);
+    QMutexLocker locker(&m_data->mutex);
     m_data->selectedNameFilter = f;
 }
 
@@ -771,13 +771,13 @@ inline QString QWindowsFileDialogSharedData::selectedFile() const
 
 inline void QWindowsFileDialogSharedData::setSelectedFiles(const QList<QUrl> &urls)
 {
-    QMutexLocker (&m_data->mutex);
+    QMutexLocker locker(&m_data->mutex);
     m_data->selectedFiles = urls;
 }
 
 inline void QWindowsFileDialogSharedData::fromOptions(const QSharedPointer<QFileDialogOptions> &o)
 {
-    QMutexLocker (&m_data->mutex);
+    QMutexLocker locker(&m_data->mutex);
     m_data->directory = o->initialDirectory();
     m_data->selectedFiles = o->initiallySelectedFiles();
     m_data->selectedNameFilter = o->initiallySelectedNameFilter();