diff --git a/amostra/server/utils.py b/amostra/server/utils.py
index fe58c73..7fd9f2a 100644
--- a/amostra/server/utils.py
+++ b/amostra/server/utils.py
@@ -42,7 +42,7 @@ def unpack_params(handler):
     if isinstance(handler, tornado.web.RequestHandler):
         return ujson.loads(list(handler.request.arguments.keys())[0])
     else:
-        raise TypeError("Wrong type", handler)
+        raise TypeError("Wrong type")
 
 
 def return2client(handler, payload):