diff --git a/block/bio.c b/block/bio.c
index 640d0fb74a8b..0a2ee0948a01 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -327,7 +327,7 @@ static void bio_chain_endio(struct bio *bio)
 /**
  * bio_chain - chain bio completions
  * @bio: the target bio
- * @parent: the @bio's parent bio
+ * @parent: the parent bio of @bio
  *
  * The caller won't have a bi_end_io called when @bio completes - instead,
  * @parent's bi_end_io won't be called until both @parent and @bio have