diff --git a/src/core/suspend_.ml b/src/core/suspend_.ml
index 68ae01bb..193d3639 100644
--- a/src/core/suspend_.ml
+++ b/src/core/suspend_.ml
@@ -1,5 +1,3 @@
-module A = Atomic_
-
 type suspension = unit Exn_bt.result -> unit
 type task = unit -> unit
 
diff --git a/src/lwt/IO.ml b/src/lwt/IO.ml
index cc962e67..2775a400 100644
--- a/src/lwt/IO.ml
+++ b/src/lwt/IO.ml
@@ -11,12 +11,12 @@ let rec read fd buf i len : int =
       Moonpool.Private.Suspend_.suspend
         {
           handle =
-            (fun ~ls ~run:_ ~resume sus ->
+            (fun ~run:_ ~resume sus ->
               Perform_action_in_lwt.schedule
               @@ Action.Wait_readable
                    ( fd,
                      fun cancel ->
-                       resume ~ls sus @@ Ok ();
+                       resume sus @@ Ok ();
                        Lwt_engine.stop_event cancel ));
         };
       read fd buf i len
@@ -33,12 +33,12 @@ let rec write_once fd buf i len : int =
       Moonpool.Private.Suspend_.suspend
         {
           handle =
-            (fun ~ls ~run:_ ~resume sus ->
+            (fun ~run:_ ~resume sus ->
               Perform_action_in_lwt.schedule
               @@ Action.Wait_writable
                    ( fd,
                      fun cancel ->
-                       resume ~ls sus @@ Ok ();
+                       resume sus @@ Ok ();
                        Lwt_engine.stop_event cancel ));
         };
       write_once fd buf i len
@@ -60,12 +60,12 @@ let sleep_s (f : float) : unit =
     Moonpool.Private.Suspend_.suspend
       {
         handle =
-          (fun ~ls ~run:_ ~resume sus ->
+          (fun ~run:_ ~resume sus ->
             Perform_action_in_lwt.schedule
             @@ Action.Sleep
                  ( f,
                    false,
                    fun cancel ->
-                     resume ~ls sus @@ Ok ();
+                     resume sus @@ Ok ();
                      Lwt_engine.stop_event cancel ));
       }
diff --git a/src/lwt/base.ml b/src/lwt/base.ml
index 4ed374fa..1642587a 100644
--- a/src/lwt/base.ml
+++ b/src/lwt/base.ml
@@ -107,8 +107,8 @@ let await_lwt (fut : _ Lwt.t) =
     M.Private.Suspend_.suspend
       {
         handle =
-          (fun ~ls ~run:_ ~resume sus ->
-            let on_lwt_done _ = resume ~ls sus @@ Ok () in
+          (fun ~run:_ ~resume sus ->
+            let on_lwt_done _ = resume sus @@ Ok () in
             Perform_action_in_lwt.(
               schedule Action.(On_termination (fut, on_lwt_done))));
       };
diff --git a/src/lwt/moonpool_lwt.ml b/src/lwt/moonpool_lwt.ml
index c3133d2e..c89cebe2 100644
--- a/src/lwt/moonpool_lwt.ml
+++ b/src/lwt/moonpool_lwt.ml
@@ -48,12 +48,12 @@ module TCP_client = struct
         Moonpool.Private.Suspend_.suspend
           {
             handle =
-              (fun ~ls ~run:_ ~resume sus ->
+              (fun ~run:_ ~resume sus ->
                 Perform_action_in_lwt.schedule
                 @@ Action.Wait_writable
                      ( sock,
                        fun ev ->
-                         resume ~ls sus @@ Ok ();
+                         resume sus @@ Ok ();
                          Lwt_engine.stop_event ev ));
           };
         true