diff --git a/src/gui/text/coretext/qcoretextfontdatabase.mm b/src/gui/text/coretext/qcoretextfontdatabase.mm
index 8665faca83..fe7500b7f8 100644
--- a/src/gui/text/coretext/qcoretextfontdatabase.mm
+++ b/src/gui/text/coretext/qcoretextfontdatabase.mm
@@ -863,12 +863,7 @@ QFont *QCoreTextFontDatabase::themeFont(QPlatformTheme::Font f) const
 
 QFont QCoreTextFontDatabase::defaultFont() const
 {
-    if (defaultFontName.isEmpty()) {
-        QCFType<CTFontDescriptorRef> systemFont = descriptorForFontType(kCTFontUIFontSystem);
-        defaultFontName = QCFString(CTFontDescriptorCopyAttribute(systemFont, kCTFontFamilyNameAttribute));
-    }
-
-    return QFont(defaultFontName);
+    return QFont(*themeFont(QPlatformTheme::SystemFont));
 }
 
 bool QCoreTextFontDatabase::fontsAlwaysScalable() const
diff --git a/src/gui/text/coretext/qcoretextfontdatabase_p.h b/src/gui/text/coretext/qcoretextfontdatabase_p.h
index 12f55bd8ad..4e847dc32f 100644
--- a/src/gui/text/coretext/qcoretextfontdatabase_p.h
+++ b/src/gui/text/coretext/qcoretextfontdatabase_p.h
@@ -91,8 +91,6 @@ private:
     void populateFromDescriptor(CTFontDescriptorRef font, const QString &familyName = QString(), QFontDatabasePrivate::ApplicationFont *applicationFont = nullptr);
     static CFArrayRef fallbacksForFamily(const QString &family);
 
-    mutable QString defaultFontName;
-
     QHash<QPlatformTheme::Font, QFont *> m_themeFonts;
     QHash<QString, QList<QCFType<CTFontDescriptorRef>>> m_systemFontDescriptors;