diff --git a/src/plugins/platforms/offscreen/qoffscreenintegration.h b/src/plugins/platforms/offscreen/qoffscreenintegration.h
index c84c1f7c50..a1e3a9bde8 100644
--- a/src/plugins/platforms/offscreen/qoffscreenintegration.h
+++ b/src/plugins/platforms/offscreen/qoffscreenintegration.h
@@ -69,8 +69,8 @@ public:
     QPlatformFontDatabase *fontDatabase() const override;
     QAbstractEventDispatcher *createEventDispatcher() const override;
 
-    QStringList themeNames() const;
-    QPlatformTheme *createPlatformTheme(const QString &name) const;
+    QStringList themeNames() const override;
+    QPlatformTheme *createPlatformTheme(const QString &name) const override;
 
     static QOffscreenIntegration *createOffscreenIntegration();