--- a/usr/src/grub/grub-0.97/stage2/zfs-include/spa.h	Sun May 20 02:46:39 2012 -0500
+++ b/usr/src/grub/grub-0.97/stage2/zfs-include/spa.h	Mon May 21 12:11:39 2012 -0700
@@ -16,11 +16,16 @@
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
+
 /*
  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
+/*
+ * Copyright (c) 2012 by Delphix. All rights reserved.
+ */
+
 #ifndef _SYS_SPA_H
 #define	_SYS_SPA_H
 
@@ -65,7 +70,7 @@
 /*
  * Size of block to hold the configuration data (a packed nvlist)
  */
-#define	SPA_CONFIG_BLOCKSIZE	(1 << 14)
+#define	SPA_CONFIG_BLOCKSIZE	(1ULL << 14)
 
 /*
  * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.