diff --git a/src/document/sidebar.ml b/src/document/sidebar.ml
index bb9589cb56..65c7f11768 100644
--- a/src/document/sidebar.ml
+++ b/src/document/sidebar.ml
@@ -2,12 +2,16 @@ open Odoc_utils
 open Types
 
 let sidebar_toc_entry id content =
-  let href =
-    (id :> Odoc_model.Paths.Identifier.t)
-    |> Url.from_identifier ~stop_before:false
-    |> Result.get_ok
+  let target =
+    match
+      (id :> Odoc_model.Paths.Identifier.t)
+      |> Url.from_identifier ~stop_before:false
+    with
+    | Ok href -> Target.Resolved href
+    | Error _ -> Target.Unresolved
+    (* This error case should never happen since [stop_before] is false *)
   in
-  let target = Target.Internal (Resolved href) in
+  let target = Target.Internal target in
   inline @@ Inline.Link { target; content; tooltip = None }
 
 module Toc : sig
@@ -30,8 +34,12 @@ end = struct
         | None -> None
         | Some (index_id, title) ->
             let path =
-              Url.from_identifier ~stop_before:false (index_id :> Id.t)
-              |> Result.get_ok
+              match
+                Url.from_identifier ~stop_before:false (index_id :> Id.t)
+              with
+              | Ok r -> r
+              | Error _ -> assert false
+              (* This error case should never happen since [stop_before] is false, and even less since it's a page id *)
             in
             let content = Comment.link_content title in
             Some (path, sidebar_toc_entry index_id content)
@@ -59,7 +67,7 @@ end = struct
          root. So we apply the filter_map starting from the first children. *)
       let convert ((url : Url.t), b) =
         let link =
-          if url.page = current_url && String.equal url.anchor "" then
+          if url.page = current_url && Astring.String.equal url.anchor "" then
             { b with Inline.attr = [ "current_unit" ] }
           else b
         in
diff --git a/src/document/url.ml b/src/document/url.ml
index 7048d0f86b..d1a8c928c8 100644
--- a/src/document/url.ml
+++ b/src/document/url.ml
@@ -448,18 +448,10 @@ let from_path page =
   { Anchor.page; anchor = ""; kind = (page.kind :> Anchor.kind) }
 
 let from_identifier ~stop_before x =
-  if Identifier.is_hidden x then
-    Ok
-      {
-        Anchor.page = { parent = None; kind = `Module; name = "blooooooo" };
-        anchor = "bliiiiiiii";
-        kind = `Module;
-      }
-  else
-    match x with
-    | { Identifier.iv = #Path.any_pv; _ } as p when not stop_before ->
-        Ok (from_path @@ Path.from_identifier p)
-    | p -> Anchor.from_identifier p
+  match x with
+  | { Identifier.iv = #Path.any_pv; _ } as p when not stop_before ->
+      Ok (from_path @@ Path.from_identifier p)
+  | p -> Anchor.from_identifier p
 
 let from_asset_identifier p = from_path @@ Path.from_identifier p
 
diff --git a/src/utils/odoc_list.ml b/src/utils/odoc_list.ml
new file mode 100644
index 0000000000..53ddf484c7
--- /dev/null
+++ b/src/utils/odoc_list.ml
@@ -0,0 +1,29 @@
+include List
+
+let rec concat_map ?sep ~f = function
+  | [] -> []
+  | [ x ] -> f x
+  | x :: xs -> (
+      let hd = f x in
+      let tl = concat_map ?sep ~f xs in
+      match sep with None -> hd @ tl | Some sep -> hd @ (sep :: tl))
+
+let rec filter_map acc f = function
+  | hd :: tl ->
+      let acc = match f hd with Some x -> x :: acc | None -> acc in
+      filter_map acc f tl
+  | [] -> List.rev acc
+
+let filter_map f x = filter_map [] f x
+
+(** @raise [Failure] if the list is empty. *)
+let rec last = function
+  | [] -> failwith "Odoc_utils.List.last"
+  | [ x ] -> x
+  | _ :: tl -> last tl
+
+(* From ocaml/ocaml *)
+let rec find_map f = function
+  | [] -> None
+  | x :: l -> (
+      match f x with Some _ as result -> result | None -> find_map f l)
diff --git a/src/utils/odoc_utils.ml b/src/utils/odoc_utils.ml
index 4623fc9035..9d7b8d2250 100644
--- a/src/utils/odoc_utils.ml
+++ b/src/utils/odoc_utils.ml
@@ -45,37 +45,7 @@ module EitherMonad = struct
   let of_result = function Result.Ok x -> Right x | Error y -> Left y
 end
 
-module List = struct
-  include List
-
-  let rec concat_map ?sep ~f = function
-    | [] -> []
-    | [ x ] -> f x
-    | x :: xs -> (
-        let hd = f x in
-        let tl = concat_map ?sep ~f xs in
-        match sep with None -> hd @ tl | Some sep -> hd @ (sep :: tl))
-
-  let rec filter_map acc f = function
-    | hd :: tl ->
-        let acc = match f hd with Some x -> x :: acc | None -> acc in
-        filter_map acc f tl
-    | [] -> List.rev acc
-
-  let filter_map f x = filter_map [] f x
-
-  (** @raise [Failure] if the list is empty. *)
-  let rec last = function
-    | [] -> failwith "Odoc_utils.List.last"
-    | [ x ] -> x
-    | _ :: tl -> last tl
-
-  (* From ocaml/ocaml *)
-  let rec find_map f = function
-    | [] -> None
-    | x :: l -> (
-        match f x with Some _ as result -> result | None -> find_map f l)
-end
+module List = Odoc_list
 
 module Option = struct
   let map f = function None -> None | Some x -> Some (f x)
diff --git a/src/utils/tree.ml b/src/utils/tree.ml
index 16785a8f32..6941ec865f 100644
--- a/src/utils/tree.ml
+++ b/src/utils/tree.ml
@@ -1,3 +1,5 @@
+module List = Odoc_list
+
 type 'a t = { node : 'a; children : 'a forest }
 and 'a forest = 'a t list