diff --git a/src/api_piqi_util.mli b/src/api_piqi_util.mli
index a0aad80..4014274 100644
--- a/src/api_piqi_util.mli
+++ b/src/api_piqi_util.mli
@@ -56,7 +56,7 @@ module Filter : functor
        }
      end
    end)
-  (Mext : sig
+  (_ : sig
      val parse_filters :
        ?opts:Piqirun_ext.options ->
        string ->
diff --git a/src/dune b/src/dune
index fe7f5d4..8fd58da 100644
--- a/src/dune
+++ b/src/dune
@@ -1,4 +1,4 @@
-(env ( _ (flags (:standard -w +a-4-9-35-40-42-44-48)) ) )
+(env ( _ (flags (:standard -w +a-4-9-35-40-42-44-48-58-70)) ) )
 
 (alias
   (name plugin)