1 files changed, 1 insertions, 1 deletions

diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index 857d93cd01dc..54f03354bed1 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -25,7 +25,7 @@
 #include "transaction.h"
 #include "print-tree.h"
 
-#define __MAX_CSUM_ITEMS(r, size) ((((BTRFS_LEAF_DATA_SIZE(r) - \
+#define __MAX_CSUM_ITEMS(r, size) ((unsigned long)(((BTRFS_LEAF_DATA_SIZE(r) - \
                                    sizeof(struct btrfs_item) * 2) / \
                                   size) - 1))