diff --git a/lib/bgp.ml b/lib/bgp.ml
index 69a0c1c..458cc35 100644
--- a/lib/bgp.ml
+++ b/lib/bgp.ml
@@ -1105,7 +1105,7 @@ let parse_buffer_to_t buf =
     | None -> 
       Parser_log.err (fun m -> m "This is a marker. Something unexpected occurs in Bgp.parse_buffer_to_t."); 
       assert false
-    | Some it -> Ok it 
+    | Some it -> Result.Ok it 
   with
   | Msg_fmt_err err -> Error (Msg_fmt_error err)
   | Notif_fmt_err err -> Error (Notif_fmt_error err)
diff --git a/mrt-format.opam b/mrt-format.opam
index 58529e6..7bb30b3 100644
--- a/mrt-format.opam
+++ b/mrt-format.opam
@@ -16,6 +16,9 @@ build: [
 depends: [
   "alcotest"    {test}
   "cstruct"     {>= "1.0.1"}
+  "ipaddr"      {>= "2.0.0"}
+  "logs"
   "ocamlfind"   {build}
   "ppx_cstruct" {build}
+  "result"
 ]