diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 751daacd268d..af059c44684d 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1696,7 +1696,9 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
 			btrfs_end_write_no_snapshoting(root);
 			btrfs_delalloc_release_metadata(inode, release_bytes);
 		} else {
-			btrfs_delalloc_release_space(inode, pos, release_bytes);
+			btrfs_delalloc_release_space(inode,
+						round_down(pos, root->sectorsize),
+						release_bytes);
 		}
 	}