diff --git a/ctree.h b/ctree.h
index 79a3310b..f14a7959 100644
--- a/ctree.h
+++ b/ctree.h
@@ -149,7 +149,7 @@ struct btrfs_free_space_ctl;
 /* csum types */
 #define BTRFS_CSUM_TYPE_CRC32	0
 
-static int btrfs_csum_sizes[] = { 4, 0 };
+static int btrfs_csum_sizes[] = { 4 };
 
 /* four bytes for CRC32 */
 #define BTRFS_CRC32_SIZE 4