diff --git a/convlab2/policy/genTUS/stepGenTUS.py b/convlab2/policy/genTUS/stepGenTUS.py
index c85bad73afeeb040a4d2b6e3c5c9836aad3e2354..142416a4d3c4ac2dfbb0e55a9dadb8933237e4d0 100644
--- a/convlab2/policy/genTUS/stepGenTUS.py
+++ b/convlab2/policy/genTUS/stepGenTUS.py
@@ -30,7 +30,7 @@ class UserActionPolicy(Policy):
         # self.max_in_len = 500
         # self.max_out_len = 100 if only_action else 200
         self.max_in_len = 200
-        self.max_out_len = 50 # if only_action else 200
+        self.max_out_len = 100 if only_action else 200
         max_act_len = kwargs.get("max_act_len", 3)
         self.max_action_len = max_act_len
         if "max_act_len" in kwargs: