--- Libc/Libc-320/include/crt_externs.h
+++ Libc/Libc-763.12/include/crt_externs.h
@@ -2,8 +2,6 @@
  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
  * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
@@ -40,5 +38,10 @@
 extern int *_NSGetArgc(void);
 extern char ***_NSGetEnviron(void);
 extern char **_NSGetProgname(void);
-extern struct mach_header *_NSGetMachExecuteHeader(void);
+#ifdef __LP64__
+extern struct mach_header_64 *
+#else /* !__LP64__ */
+extern struct mach_header *
+#endif /* __LP64__ */
+				_NSGetMachExecuteHeader(void);
 __END_DECLS