diff --git a/src/client/embedded/alpha/baker/client_mining_forge.ml b/src/client/embedded/alpha/baker/client_mining_forge.ml
index 7d0cce867..0ffc252a9 100644
--- a/src/client/embedded/alpha/baker/client_mining_forge.ml
+++ b/src/client/embedded/alpha/baker/client_mining_forge.ml
@@ -271,7 +271,7 @@ end = struct
          | Error _ -> failwith "Json.write_file"
          | Ok () -> return ())
       (fun exn ->
-         Error_monad.failwith
+         failwith
            "could not write the block file: %s."
            (Printexc.to_string exn))
 
@@ -377,7 +377,7 @@ let get_unrevealed_nonces cctxt ?(force = false) block =
   | Some cycle ->
       Client_mining_blocks.blocks_from_cycle
         cctxt.rpc_config block cycle >>=? fun blocks ->
-      map_filter_s (fun hash ->
+      filter_map_s (fun hash ->
           Client_proto_nonces.find cctxt hash >>= function
           | None -> return None
           | Some nonce ->
@@ -466,7 +466,7 @@ let mine cctxt state =
   let slots = pop_mining_slots state in
   let seed_nonce = generate_seed_nonce () in
   let seed_nonce_hash = Nonce.hash seed_nonce in
-  Error_monad.map_filter_s
+  filter_map_s
     (fun (timestamp, (bi, priority, delegate)) ->
        let block = `Hash bi.Client_mining_blocks.hash in
        let timestamp =
diff --git a/src/client/embedded/alpha/baker/client_mining_main.ml b/src/client/embedded/alpha/baker/client_mining_main.ml
index 6d66850f1..1f2834288 100644
--- a/src/client/embedded/alpha/baker/client_mining_main.ml
+++ b/src/client/embedded/alpha/baker/client_mining_main.ml
@@ -75,7 +75,7 @@ let reveal_block_nonces cctxt ?force block_hashes =
               Block_hash.pp_short hash >>= fun () ->
             Lwt.return_none))
     block_hashes >>= fun block_infos ->
-  map_filter_s (fun (bi : Client_mining_blocks.block_info) ->
+  filter_map_s (fun (bi : Client_mining_blocks.block_info) ->
       Client_proto_nonces.find cctxt bi.hash >>= function
       | None ->
           cctxt.warning "Cannot find nonces for block %a (ignoring)@."
diff --git a/src/proto/environment/error_monad.mli b/src/proto/environment/error_monad.mli
index 3e3ba17e8..6e76d743c 100644
--- a/src/proto/environment/error_monad.mli
+++ b/src/proto/environment/error_monad.mli
@@ -99,8 +99,8 @@ val map2_s :
   ('a -> 'b -> 'c tzresult Lwt.t) -> 'a list -> 'b list ->
   'c list tzresult Lwt.t
 
-(** A {!List.map_filter} in the monad *)
-val map_filter_s : ('a -> 'b option tzresult Lwt.t) -> 'a list -> 'b list tzresult Lwt.t
+(** A {!List.filter_map} in the monad *)
+val filter_map_s : ('a -> 'b option tzresult Lwt.t) -> 'a list -> 'b list tzresult Lwt.t
 
 (** A {!List.fold_left} in the monad *)
 val fold_left_s : ('a -> 'b -> 'a tzresult Lwt.t) -> 'a -> 'b list -> 'a tzresult Lwt.t
diff --git a/src/utils/error_monad.ml b/src/utils/error_monad.ml
index e193fbaf8..ebf425b41 100644
--- a/src/utils/error_monad.ml
+++ b/src/utils/error_monad.ml
@@ -269,22 +269,22 @@ module Make() = struct
         map2 f t1 t2 >>? fun rt ->
         Ok (rh :: rt)
 
-  let rec map_filter_s f l =
+  let rec filter_map_s f l =
     match l with
     | [] -> return []
     | h :: t ->
         f h >>=? function
-        | None -> map_filter_s f t
+        | None -> filter_map_s f t
         | Some rh ->
-            map_filter_s f t >>=? fun rt ->
+            filter_map_s f t >>=? fun rt ->
             return (rh :: rt)
 
-  let rec map_filter_p f l =
+  let rec filter_map_p f l =
     match l with
     | [] -> return []
     | h :: t ->
         let th = f h
-        and tt = map_filter_s f t in
+        and tt = filter_map_s f t in
         th >>=? function
         | None -> tt
         | Some rh ->
diff --git a/src/utils/error_monad_sig.ml b/src/utils/error_monad_sig.ml
index 8afb570d5..0f7a5d190 100644
--- a/src/utils/error_monad_sig.ml
+++ b/src/utils/error_monad_sig.ml
@@ -134,10 +134,10 @@ module type S = sig
     ('a -> 'b -> 'c tzresult Lwt.t) -> 'a list -> 'b list ->
     'c list tzresult Lwt.t
 
-  (** A {!List.map_filter} in the monad *)
-  val map_filter_s :
+  (** A {!List.filter_map} in the monad *)
+  val filter_map_s :
     ('a -> 'b option tzresult Lwt.t) -> 'a list -> 'b list tzresult Lwt.t
-  val map_filter_p :
+  val filter_map_p :
     ('a -> 'b option tzresult Lwt.t) -> 'a list -> 'b list tzresult Lwt.t
 
   (** A {!List.fold_left} in the monad *)