diff --git a/stdlib/unit.mli b/stdlib/unit.mli
index 8c7cb211e..e71f279a0 100644
--- a/stdlib/unit.mli
+++ b/stdlib/unit.mli
@@ -19,7 +19,7 @@
 
 (** {1:unit The unit type} *)
 
-type t = unit = ()
+type t = unit = () (**)
 (** The unit type.
 
     The constructor [()] is included here so that it has a path,