diff --git a/engine/lib/span.mli b/engine/lib/span.mli
index 1974e6218..29013aba5 100644
--- a/engine/lib/span.mli
+++ b/engine/lib/span.mli
@@ -2,32 +2,35 @@ type t [@@deriving show, yojson, sexp, compare, eq, hash]
 
 val display : t -> string
 
-(** Imports a THIR span as a hax span *)
 val of_thir : Types.span -> t
-(** Exports a hax span to THIR spans (a hax span might be a collection of spans) *)
+(** Imports a THIR span as a hax span *)
+
 val to_thir : t -> Types.span list
+(** Exports a hax span to THIR spans (a hax span might be a collection of spans) *)
 
 val union_list : t list -> t
 val union : t -> t -> t
 
-(** Generates a dummy span: this should be avoided at all cost. *)
 val dummy : unit -> t
-(** Lookup the internal unique identifier of a span. *)
+(** Generates a dummy span: this should be avoided at all cost. *)
+
 val id_of : t -> int
-(** Replaces the internal identifier by a fresh one. This can be useful for debugging. *)
+(** Lookup the internal unique identifier of a span. *)
+
 val refresh_id : t -> t
+(** Replaces the internal identifier by a fresh one. This can be useful for debugging. *)
 
+val default : t
 (** A default span can be useful when a span is required in some
 computation that never reports error and when we know the span will go
 away. Using this should be avoided. *)
-val default : t
 
+val with_owner_hint : Types.def_id -> (unit -> 't) -> 't
 (** Inserts a hint about the fact that, in function `f`, we're
 translating spans that are "owned" by an item `owner`. This should be
 used only in `import_thir`, also, the hint shall be used only to
 enhance user reporting, not for any logic within the engine. *)
-val with_owner_hint : Types.def_id -> (unit -> 't) -> 't
 
+val owner_hint : t -> Types.def_id option
 (** Looks up the owner hint for a span. This should be used for user
 reports only. *)
-val owner_hint: t -> Types.def_id option