diff --git a/headers/os/opengl/GLRenderer.h b/headers/os/opengl/GLRenderer.h
index fe383007c4..513409fa21 100644
--- a/headers/os/opengl/GLRenderer.h
+++ b/headers/os/opengl/GLRenderer.h
@@ -9,6 +9,9 @@
 #include <GLView.h>
 
 class BGLDispatcher;
+class GLRendererRoster;
+
+typedef unsigned long renderer_id;
 
 class BGLRenderer
 {
@@ -49,11 +52,21 @@ public:
 	inline	BGLDispatcher *	GLDispatcher()		{ return fDispatcher; };
 
 private:
+	friend class GLRendererRoster;
+
+	virtual status_t _Reserved_Renderer_0(int32, void *);
+	virtual status_t _Reserved_Renderer_1(int32, void *);
+	virtual status_t _Reserved_Renderer_2(int32, void *);
+	virtual status_t _Reserved_Renderer_3(int32, void *);
+	virtual status_t _Reserved_Renderer_4(int32, void *);
+
 	volatile int32		fRefCount;		// How much we're still usefull?
 	BGLView *			fView;			// Never forget who is the boss!
 	ulong				fOptions;		// Keep that tune in memory
 	BGLDispatcher *		fDispatcher;	// Our personal OpenGL API call dispatcher
 
+	GLRendererRoster *fOwningRoster;
+	renderer_id   fID;
 };
 
 extern "C" _EXPORT BGLRenderer * instanciate_gl_renderer(BGLView *view, BGLDispatcher *dispatcher);