diff --git a/examples/async/async_get.ml b/examples/async/async_get.ml
index be082e3..991eaea 100644
--- a/examples/async/async_get.ml
+++ b/examples/async/async_get.ml
@@ -9,7 +9,9 @@ let main port host () =
   Tcp.connect_sock where_to_connect
   >>= fun socket ->
     let finished = Ivar.create () in
-    let response_handler = Httpun_examples.Client.print ~on_eof:(Ivar.fill finished) in
+    let response_handler =
+      Httpun_examples.Client.print
+        ~on_eof:((Ivar.fill [@ocaml.alert "-deprecated"]) finished) in
     let headers = Headers.of_list [ "host", host ] in
     Client.create_connection socket >>= fun connection ->
     let request_body =
diff --git a/examples/async/async_get_pipelined.ml b/examples/async/async_get_pipelined.ml
index 9856b78..2f7c582 100644
--- a/examples/async/async_get_pipelined.ml
+++ b/examples/async/async_get_pipelined.ml
@@ -11,7 +11,9 @@ let main port host () =
   Tcp.connect_sock where_to_connect
   >>= fun socket ->
     let finished = Ivar.create () in
-    let response_handler = Httpun_examples.Client.print ~on_eof:(Ivar.fill finished) in
+    let response_handler =
+      Httpun_examples.Client.print
+        ~on_eof:((Ivar.fill [@ocaml.alert "-deprecated"]) finished) in
     let request_headers =
       Request.create ~headers:(Headers.of_list [ "host", host ]) `GET "/"
     in
@@ -25,7 +27,7 @@ let main port host () =
     in
     let finished' = Ivar.create () in
     let response_handler' =
-      Httpun_examples.Client.print ~on_eof:(Ivar.fill finished')
+      Httpun_examples.Client.print ~on_eof:((Ivar.fill [@ocaml.alert "-deprecated"]) finished')
     in
     let request_body' =
       Client.request
diff --git a/examples/async/async_https_get.ml b/examples/async/async_https_get.ml
index a567d84..bf40f6d 100644
--- a/examples/async/async_https_get.ml
+++ b/examples/async/async_https_get.ml
@@ -10,7 +10,7 @@ let response_handler finished response response_body =
     let rec on_read bs ~off ~len =
       Bigstring.to_string ~pos:off ~len bs |> print_endline;
       Body.Reader.schedule_read response_body ~on_read ~on_eof
-    and on_eof () = Ivar.fill finished () in
+    and on_eof () = (Ivar.fill [@ocaml.alert "-deprecated"]) finished () in
     Body.Reader.schedule_read response_body ~on_read ~on_eof;
   | response ->
     Format.fprintf Format.std_formatter "%a\n%!" Response.pp_hum response;
diff --git a/examples/async/async_post.ml b/examples/async/async_post.ml
index b17c20c..21c075b 100644
--- a/examples/async/async_post.ml
+++ b/examples/async/async_post.ml
@@ -9,7 +9,9 @@ let main port host () =
   Tcp.connect_sock where_to_connect
   >>= fun socket ->
     let finished = Ivar.create () in
-    let response_handler = Httpun_examples.Client.print ~on_eof:(Ivar.fill finished) in
+    let response_handler =
+      Httpun_examples.Client.print
+        ~on_eof:((Ivar.fill [@alert "-deprecated"]) finished) in
     let headers =
       Headers.of_list
       [ "transfer-encoding", "chunked"
@@ -29,7 +31,7 @@ let main port host () =
     don't_wait_for (
       Reader.read_one_chunk_at_a_time stdin ~handle_chunk:(fun bs ~pos:off ~len ->
         Body.Writer.write_bigstring request_body bs ~off ~len;
-        Body.Writer.flush request_body (fun () -> ());
+        Body.Writer.flush request_body (fun _reason -> ());
         return (`Consumed(len, `Need_unknown)))
       >>| function
         | `Eof_with_unconsumed_data s -> Body.Writer.write_string request_body s;