diff --git a/src/client/opentelemetry_client_ocurl.mli b/src/client/opentelemetry_client_ocurl.mli
index 250767d9..4292586f 100644
--- a/src/client/opentelemetry_client_ocurl.mli
+++ b/src/client/opentelemetry_client_ocurl.mli
@@ -18,6 +18,7 @@ val set_mutex : lock:(unit -> unit) -> unlock:(unit -> unit) -> unit
 (** Set a lock/unlock pair to protect the critical sections
     of {!Opentelemetry.Collector.BACKEND} *)
 
+module Atomic = Opentelemetry_atomic.Atomic
 module Config = Config
 
 val setup :