diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 02fae7f..17dffe33 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -4430,7 +4430,7 @@
 }
 
 /*
- * make the item pointed to by the path bigger, data_size is the new size.
+ * make the item pointed to by the path bigger, data_size is the added size.
  */
 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
 		       u32 data_size)