diff --git a/ChangeLog b/ChangeLog
index 299d51b4d..6fd1989b9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2013-10-25  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/fs/ext2.c (EXT2_BLOCK_SIZE): Make unsigned.
+
 2013-10-25  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* grub-core/commands/gptsync.c (lba_to_chs): Use proper types rather
diff --git a/grub-core/fs/ext2.c b/grub-core/fs/ext2.c
index 18429ac51..46fb76f55 100644
--- a/grub-core/fs/ext2.c
+++ b/grub-core/fs/ext2.c
@@ -58,7 +58,7 @@ GRUB_MOD_LICENSE ("GPLv3+");
 	(grub_le_to_cpu32 (data->sblock.log2_block_size) + 10)
 
 /* The size of an ext2 block in bytes.  */
-#define EXT2_BLOCK_SIZE(data)		(1 << LOG2_BLOCK_SIZE (data))
+#define EXT2_BLOCK_SIZE(data)		(1U << LOG2_BLOCK_SIZE (data))
 
 /* The revision level.  */
 #define EXT2_REVISION(data)	grub_le_to_cpu32 (data->sblock.revision_level)