diff --git a/src/gui/kernel/qplatformdialoghelper.cpp b/src/gui/kernel/qplatformdialoghelper.cpp
index 82b60b77490..9ed2557ad97 100644
--- a/src/gui/kernel/qplatformdialoghelper.cpp
+++ b/src/gui/kernel/qplatformdialoghelper.cpp
@@ -771,7 +771,7 @@ const char QPlatformFileDialogHelper::filterRegExp[] =
 QStringList QPlatformFileDialogHelper::cleanFilterList(const QString &filter)
 {
 #if QT_CONFIG(regularexpression)
-    QRegularExpression regexp(QString::fromLatin1(filterRegExp));
+    static const QRegularExpression regexp(QString::fromLatin1(filterRegExp));
     Q_ASSERT(regexp.isValid());
     QString f = filter;
     QRegularExpressionMatch match = regexp.match(filter);
diff --git a/src/widgets/dialogs/qfiledialog.cpp b/src/widgets/dialogs/qfiledialog.cpp
index 74484b629d8..8e29609395f 100644
--- a/src/widgets/dialogs/qfiledialog.cpp
+++ b/src/widgets/dialogs/qfiledialog.cpp
@@ -1375,7 +1375,7 @@ QStringList qt_strip_filters(const QStringList &filters)
 {
 #if QT_CONFIG(regularexpression)
     QStringList strippedFilters;
-    QRegularExpression r(QString::fromLatin1(QPlatformFileDialogHelper::filterRegExp));
+    static const QRegularExpression r(QString::fromLatin1(QPlatformFileDialogHelper::filterRegExp));
     const int numFilters = filters.count();
     strippedFilters.reserve(numFilters);
     for (int i = 0; i < numFilters; ++i) {