diff --git a/src/servers/app/proto6/Layer.h b/src/servers/app/proto6/Layer.h
index b11dabfd2b..e77f19facb 100644
--- a/src/servers/app/proto6/Layer.h
+++ b/src/servers/app/proto6/Layer.h
@@ -67,7 +67,8 @@ public:
 			*bottomchild;
 
 	BRegion *visible,
-			*invalid;
+			*invalid,
+			*full;
 
 	ServerWindow *serverwin;
 
@@ -78,6 +79,7 @@ public:
 	uint8 hidecount;
 	bool is_dirty;		// true if we need to redraw
 	bool is_updating;
+	bool is_visible;
 };
 
 class RootLayer : public Layer
diff --git a/src/servers/app/proto6/WindowBorder.h b/src/servers/app/proto6/WindowBorder.h
index 8463e822a8..8a422d5dc1 100644
--- a/src/servers/app/proto6/WindowBorder.h
+++ b/src/servers/app/proto6/WindowBorder.h
@@ -21,6 +21,7 @@ public:
 	void SetDecorator(Decorator *newdecor);
 	ServerWindow *Window(void) const;
 	void RequestDraw(void);
+	void InvalidateLowerSiblings(BRect r);
 	void MoveToBack(void);
 	void MoveToFront(void);