diff --git a/utils.ml b/utils.ml
index 12a4eb2..304b823 100644
--- a/utils.ml
+++ b/utils.ml
@@ -1,4 +1,4 @@
 let rec deoptionalise = function
-  | (Some x) :: xs -> x :: deoptionalise xs
+  | Some x :: xs -> x :: deoptionalise xs
   | None :: xs -> deoptionalise xs
   | [] -> []