diff --git a/headers/private/interface/WindowStack.h b/headers/private/interface/WindowStack.h
index 02f46e00c1..947b14360e 100644
--- a/headers/private/interface/WindowStack.h
+++ b/headers/private/interface/WindowStack.h
@@ -14,31 +14,31 @@ public:
 								BWindowStack(BWindow* window);
 								~BWindowStack();
 
-		status_t				AddWindow(const BWindow* window);
-		status_t				AddWindow(const BMessenger& window);
-		status_t				AddWindowAt(const BWindow* window,
+			status_t			AddWindow(const BWindow* window);
+			status_t			AddWindow(const BMessenger& window);
+			status_t			AddWindowAt(const BWindow* window,
 									int32 position);
-		status_t				AddWindowAt(const BMessenger& window,
+			status_t			AddWindowAt(const BMessenger& window,
 									int32 position);
 
-		status_t				RemoveWindow(const BWindow* window);
-		status_t				RemoveWindow(const BMessenger& window);
-		status_t				RemoveWindowAt(int32 position,
+			status_t			RemoveWindow(const BWindow* window);
+			status_t			RemoveWindow(const BMessenger& window);
+			status_t			RemoveWindowAt(int32 position,
 									BMessenger* window = NULL);
 
-		int32					CountWindows();
+			int32				CountWindows();
 
-		status_t				WindowAt(int32 position,
-									BMessenger& messenger);
-		bool					HasWindow(const BWindow* window);
-		bool					HasWindow(const BMessenger& window);
+			status_t			WindowAt(int32 position,
+								BMessenger& messenger);
+			bool				HasWindow(const BWindow* window);
+			bool				HasWindow(const BMessenger& window);
 
 private:
-		status_t				_AttachMessenger(const BMessenger& window);
-		status_t				_ReadMessenger(BMessenger& window);
-		status_t				_StartMessage(int32 what);
+			status_t			_AttachMessenger(const BMessenger& window);
+			status_t			_ReadMessenger(BMessenger& window);
+			status_t			_StartMessage(int32 what);
 
-		BPrivate::PortLink*		fLink;
+			BPrivate::PortLink*	fLink;
 };