diff --git a/src/oDate.ml b/src/oDate.ml
index ef86a5c..6f9ada4 100644
--- a/src/oDate.ml
+++ b/src/oDate.ml
@@ -383,11 +383,10 @@ module Make(Implem : Implem) = struct
       length = String.length str
     }
 
-    (*
-    let parse_constant s =
+    let _parse_constant s =
       let size = String.length s in
       (fun ptr ->
-        let {str;pos; _} = ptr in
+        let {str;pos;_} = ptr in
         let rec loop i =
           if i = size
           then ()
@@ -398,7 +397,6 @@ module Make(Implem : Implem) = struct
         let () = loop 0 in
         ptr.pos <- ptr.pos + size
       )
-       *)
 
     let parse_constant_i s =
       let (+++) a i = char_of_int ( int_of_char a + i) in
@@ -476,22 +474,20 @@ module Make(Implem : Implem) = struct
         end)
 
     let parse_single_char = parse_char ~min:1 ~max:1
-    (* let parse_char_plus x = parse_char ~min:1 x *)
-
+    let _parse_char_plus x = parse_char ~min:1 x
+    let ignore' f = (fun ptr -> ignore (f ptr))
 
     let (>>==) f g =
       (fun ptr -> g (f ptr))
     let (>>=|) f c =
-      (fun ptr -> ignore (f ptr); c)
+      (fun ptr -> f ptr; c)
 
-    (*
-let parse_remaining ptr =
+    let _parse_remaining ptr =
       let size = String.length ptr.str in
       let s = String.sub ptr.str ptr.pos (size - ptr.pos) in
       ptr.pos <- size;
       s
- *)
-      
+
     let parse_option p ptr=
       try Some (p ptr) with _ -> None
 
@@ -504,7 +500,7 @@ let parse_remaining ptr =
           let s = Weekday.to_string w in
           let s = if short then String.sub s 0 3 else s in
           loop (succ i) ((parse_constant_i s >>=| w) :: acc) in
-      parse_sum (loop 0 [(fun _ -> failwith "weekday")])
+      parse_sum (loop 0 [(fun _ptr -> failwith "weekday")])
 
     let parse_month short =
       let rec loop i acc =
@@ -517,26 +513,22 @@ let parse_remaining ptr =
           loop (succ i) ((parse_constant_i s >>=| m) :: acc) in
       parse_sum (loop 1 [])
 
-    (*
-    let parse_seq l ptr =
+    let _parse_seq l ptr =
       let rec loop acc = function
         | [] -> List.rev acc
         | x::xs -> loop (x ptr :: acc) xs in
       loop [] l
- *)
-        
-    (*
-    let parse_fold f acc l ptr =
+
+    let _parse_fold f acc l ptr =
       let rec loop acc = function
         | [] -> acc
         | x::xs -> loop (f acc (x ptr)) xs in
       loop acc l
- *)
-        
+
     let parse_sign =
       parse_sum [
-        parse_single_char '-' >>=| (-);
-        parse_single_char '+' >>=| (+)
+        (ignore' (parse_single_char '-') >>=| (-));
+        (ignore' (parse_single_char '+') >>=| (+))
       ]
 
     let parse_timezone =
@@ -621,7 +613,7 @@ let parse_remaining ptr =
         let tokens = date_token s in
         let l = List.rev_map (function
             | String s -> parse_constant_i s >>=| (fun d -> d)
-            | Space -> parse_space >>=| (fun d -> d)
+            | Space -> ignore' parse_space >>=| (fun d -> d)
             | Directive (p,c) -> parse_directive (p,c)
             | EOL -> assert false) tokens
         in
@@ -643,7 +635,7 @@ let parse_remaining ptr =
         ) abbreviations in
       List.iter add_abbr abbr
 
-    let human ?tz {s;m;h;day;month;year;tz=tz';_} =
+    let human ?tz {s;m;h;day;month;year;tz=tz';wday=_} =
       let tz = match tz with
         | None -> tz'
         | Some x -> x in
@@ -776,7 +768,7 @@ let parse_remaining ptr =
     let a = a mod n in
     if a < 0 then a + n else a
 
-  let calendar_advance t {D.forward;h;m;s;day;month;year;_} =
+  let calendar_advance t {D.forward;h;m;s;day;month;year;ms=_} =
     let human = To.human t in
     let add = if forward then (fun a x -> a + x) else (fun a x -> a - x) in
     let human = {human with
@@ -987,7 +979,7 @@ module MakeImplem(C : Clock) : Implem = struct
     }
   let now () = C.time ()
   let now_milliseconds () = C.gettimeofday () *. 1000.
-  let from_human ?tz {s;m;h;day;month;year;tz=tz';_} =
+  let from_human ?tz {s;m;h;day;month;year;tz=tz';wday=_} =
     let tz = match tz with
       | None -> tz'
       | Some tz -> tz in
diff --git a/src/oDuration.ml b/src/oDuration.ml
index f9511b9..aafbe8d 100644
--- a/src/oDuration.ml
+++ b/src/oDuration.ml
@@ -37,6 +37,7 @@ module type S = sig
     val human : human_readable -> t
   end
   module To : sig
+    val ms : t -> int
     val s : t -> int
     val s_float : t -> float
     val m : t -> int
@@ -90,7 +91,7 @@ module D : S = struct
   end
 
   module To = struct
-    (* let ms t = int_of_float (O.to_float t) *)
+    let ms t = int_of_float (O.to_float t)
     let s_float t = O.(to_float (t / ms_in_s))
     let aux divide t = int_of_float (O.to_float t /. O.to_float divide)
     let s = aux ms_in_s
diff --git a/src/oDuration.mli b/src/oDuration.mli
index 2548a87..c9fa6b0 100644
--- a/src/oDuration.mli
+++ b/src/oDuration.mli
@@ -40,6 +40,7 @@ module type S = sig
     val human : human_readable -> t
   end
   module To : sig
+    val ms : t -> int
     val s : t -> int
     val s_float : t -> float
     val m : t -> int