diff --git a/lib/cset.mli b/lib/cset.mli
index fcc3c4bc..f1729d23 100644
--- a/lib/cset.mli
+++ b/lib/cset.mli
@@ -80,5 +80,4 @@ val csingle : char -> t
 val is_empty : t -> bool
 val prepend : t -> 'a list -> (t * 'a list) list -> (t * 'a list) list
 val pick : t -> c
-
 val offset : int -> t -> t