diff --git a/apps/transport/lib/validators/enroute_chouette_valid_client.ex b/apps/transport/lib/validators/enroute_chouette_valid_client.ex
index 645dacf0ac..aeb9390ab9 100644
--- a/apps/transport/lib/validators/enroute_chouette_valid_client.ex
+++ b/apps/transport/lib/validators/enroute_chouette_valid_client.ex
@@ -57,7 +57,7 @@ defmodule Transport.EnRouteChouetteValidClient do
   end
 
   defp make_file_part(field_name, filepath) do
-    {field_name, filepath, {"form-data", [{:name, "file"}, {:filename, Path.basename(filepath)}]}, []}
+    {:file, filepath, {"form-data", [{:name, field_name}, {:filename, Path.basename(filepath)}]}, []}
   end
 
   defp validation_url(validation_id) do
diff --git a/apps/transport/test/transport/validators/enroute_chouette_valid_client_test.exs b/apps/transport/test/transport/validators/enroute_chouette_valid_client_test.exs
index 35746545ca..7132741bbf 100644
--- a/apps/transport/test/transport/validators/enroute_chouette_valid_client_test.exs
+++ b/apps/transport/test/transport/validators/enroute_chouette_valid_client_test.exs
@@ -31,8 +31,7 @@ defmodule Transport.EnRouteChouetteValidClientTest do
 
       assert [
                {"validation[rule_set]", "french"},
-               {"validation[file]", tmp_file, {"form-data", [{:name, "file"}, {:filename, Path.basename(tmp_file)}]},
-                []}
+               {:file, tmp_file, {"form-data", [{:name, "validation[file]"}, {:filename, Path.basename(tmp_file)}]}, []}
              ] == parts
 
       %HTTPoison.Response{status_code: 201, body: response_body}