diff --git a/layout/xul/base/src/Makefile.in b/layout/xul/base/src/Makefile.in
index 8343e4c15d3c..dde976e38d30 100644
--- a/layout/xul/base/src/Makefile.in
+++ b/layout/xul/base/src/Makefile.in
@@ -44,7 +44,6 @@ CPPSRCS		= \
         nsBoxLayoutState.cpp \
         nsBoxToBlockAdaptor.cpp \
         nsButtonBoxFrame.cpp \
-        nsCheckBoxFrame.cpp \
         nsContainerBox.cpp \
         nsLeafBoxFrame.cpp \
         nsSprocketLayout.cpp \
diff --git a/layout/xul/base/src/makefile.win b/layout/xul/base/src/makefile.win
index 487675854fa5..1a3be3434fef 100644
--- a/layout/xul/base/src/makefile.win
+++ b/layout/xul/base/src/makefile.win
@@ -46,7 +46,6 @@ CPPSRCS=					\
     	nsSliderFrame.cpp \
         nsProgressMeterFrame.cpp        \
         nsTitledButtonFrame.cpp        \
-    	nsCheckBoxFrame.cpp \
         nsTitledBoxFrame.cpp        \
         nsBox.cpp        \
         nsContainerBox.cpp        \
diff --git a/layout/xul/base/src/nsCheckBoxFrame.h b/layout/xul/base/src/nsCheckBoxFrame.h
deleted file mode 100644
index 341afea811fa..000000000000
--- a/layout/xul/base/src/nsCheckBoxFrame.h
+++ /dev/null
@@ -1,39 +0,0 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- *
- * The contents of this file are subject to the Netscape Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/NPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is Mozilla Communicator client code.
- *
- * The Initial Developer of the Original Code is Netscape Communications
- * Corporation.  Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s): 
- */
-#ifndef nsCheckBoxFrame_h___
-#define nsCheckBoxFrame_h___
-
-#include "nsButtonBoxFrame.h"
-
-class nsCheckBoxFrame : public nsButtonBoxFrame
-{
-public:
-
-  friend nsresult NS_NewCheckBoxFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame);
-
-  PRIntn GetDefaultAlignment();
-
-  nsCheckBoxFrame(nsIPresShell* aPresShell);
-
-}; // class nsCheckBoxFrame
-
-#endif /* nsCheckBoxFrame_h___ */