diff --git a/cohttp-eio/src/server.ml b/cohttp-eio/src/server.ml
index b1b2fe6f8..51543246a 100644
--- a/cohttp-eio/src/server.ml
+++ b/cohttp-eio/src/server.ml
@@ -2,7 +2,7 @@ open Utils
 module IO = Io.IO
 
 type body = Body.t
-type conn = IO.conn * Cohttp.Connection.t [@@warning "-3"]
+type conn = IO.conn * Cohttp.Connection.t
 type writer = Http.Request.t * IO.oc
 type response = writer -> unit
 
diff --git a/cohttp-lwt/src/server.ml b/cohttp-lwt/src/server.ml
index 397b80ed9..8b89c5b23 100644
--- a/cohttp-lwt/src/server.ml
+++ b/cohttp-lwt/src/server.ml
@@ -1,6 +1,6 @@
 open Lwt.Infix
 module Header = Cohttp.Header
-module Connection = Cohttp.Connection [@@warning "-3"]
+module Connection = Cohttp.Connection
 
 module Make (IO : S.IO) = struct
   module IO = IO
diff --git a/cohttp-mirage/src/static.ml b/cohttp-mirage/src/static.ml
index 26b4c9509..d7b7fc30b 100644
--- a/cohttp-mirage/src/static.ml
+++ b/cohttp-mirage/src/static.ml
@@ -18,7 +18,7 @@
  *)
 
 module Key = Mirage_kv.Key
-module Connection = Cohttp.Connection [@@warning "-3"]
+module Connection = Cohttp.Connection
 
 module HTTP (FS : Mirage_kv.RO) (S : Cohttp_lwt.S.Server) = struct
   open Lwt.Infix
diff --git a/cohttp/src/cohttp.ml b/cohttp/src/cohttp.ml
index a5aa7db98..52035cc4a 100644
--- a/cohttp/src/cohttp.ml
+++ b/cohttp/src/cohttp.ml
@@ -2,7 +2,7 @@ module Accept = Accept
 module Auth = Auth
 module Body = Body
 module Conf = Conf
-module Connection = Connection [@@deprecated "Connection.t values are useless."]
+module Connection = Connection
 module Code = Code
 module Cookie = Cookie
 module Header = Header
diff --git a/cohttp/src/server.ml b/cohttp/src/server.ml
index 0c2675322..c83bf702c 100644
--- a/cohttp/src/server.ml
+++ b/cohttp/src/server.ml
@@ -2,7 +2,7 @@ module type S = sig
   module IO : S.IO
 
   type body
-  type conn = IO.conn * Connection.t [@@warning "-3"]
+  type conn = IO.conn * Connection.t
   type response
 
   type response_action =