diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index e5c9261dcbaa..ff0c35976657 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -386,7 +386,7 @@ int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
 {
 	struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;
 	struct btrfs_mapping_tree *map_tree;
-	u64 logical = bio->bi_sector << 9;
+	u64 logical = (u64)bio->bi_sector << 9;
 	u64 length = 0;
 	u64 map_length;
 	int ret;
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index f63cf7621a01..2eed7f91f51a 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2187,7 +2187,7 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
 	struct btrfs_mapping_tree *map_tree;
 	struct btrfs_device *dev;
 	struct bio *first_bio = bio;
-	u64 logical = bio->bi_sector << 9;
+	u64 logical = (u64)bio->bi_sector << 9;
 	u64 length = 0;
 	u64 map_length;
 	struct btrfs_multi_bio *multi = NULL;