diff --git a/moulinette/interfaces/api.py b/moulinette/interfaces/api.py
index bd8d903a..f6c6141a 100644
--- a/moulinette/interfaces/api.py
+++ b/moulinette/interfaces/api.py
@@ -342,9 +342,9 @@ class _ActionsMapPlugin(object):
                 params[a] = True
 
             # Append other request params
-            req_params = request.params.decode().dict.items()
+            req_params = list(request.params.decode().dict.items())
             # TODO test special chars in filename
-            req_params += request.files.dict.items()
+            req_params+=list(request.files.dict.items())
             for k, v in req_params:
                 v = _format(v)
                 if k not in params.keys():