diff --git a/src/client/resource_signal.ml b/src/client/resource_signal.ml
index 8bdf8934..bd443ec0 100644
--- a/src/client/resource_signal.ml
+++ b/src/client/resource_signal.ml
@@ -152,3 +152,5 @@ module Pp = struct
     | Metrics ms -> metrics fmt ms
     | Traces ts -> traces fmt ts
 end
+
+let pp = Pp.pp
diff --git a/src/client/resource_signal.mli b/src/client/resource_signal.mli
index beb81a5a..948b816f 100644
--- a/src/client/resource_signal.mli
+++ b/src/client/resource_signal.mli
@@ -14,6 +14,8 @@ type t =
   | Metrics of Opentelemetry_proto.Metrics.resource_metrics list
   | Logs of Opentelemetry_proto.Logs.resource_logs list
 
+val pp : Format.formatter -> t -> unit
+
 val of_logs :
   ?service_name:string ->
   ?attrs:OTEL.Key_value.t list ->