diff --git a/plugins/platforms/wayland/wayland_output.h b/plugins/platforms/wayland/wayland_output.h
--- a/plugins/platforms/wayland/wayland_output.h
+++ b/plugins/platforms/wayland/wayland_output.h
@@ -53,8 +53,6 @@
     WaylandOutput(KWayland::Client::Surface *surface, WaylandBackend *backend);
     ~WaylandOutput() override;
 
-    void init(const QPoint &logicalPosition, const QSize &pixelSize);
-
     virtual void lockPointer(KWayland::Client::Pointer *pointer, bool lock) {
         Q_UNUSED(pointer)
         Q_UNUSED(lock)
@@ -90,10 +88,14 @@
     }
 
 private:
+    void init(const QPoint &logicalPosition, const QSize &pixelSize);
+
     KWayland::Client::Surface *m_surface;
     WaylandBackend *m_backend;
 
     bool m_rendered = false;
+
+    friend class WaylandBackend;
 };
 
 class ShellOutput : public WaylandOutput