diff --git a/douzero/dmc/utils.py b/douzero/dmc/utils.py
index 70eced7..7262d72 100644
--- a/douzero/dmc/utils.py
+++ b/douzero/dmc/utils.py
@@ -95,7 +95,7 @@ def act(i, device, batch_queues, model, flags):
         obs_x_batch_buf = {p: [] for p in positions}
 
         position_index = {"landlord": 31, "landlord_up": 32, "landlord_front": 33, "landlord_down": 34}
-        bid_type_index = {"landlord": 41, "landlord_up": 42, "landlord_front": 43, "landlord_down": 43}
+        bid_type_index = {"landlord": 41, "landlord_up": 42, "landlord_front": 43, "landlord_down": 44}
         bid_type_map = {41: "landlord", 42: "landlord_up", 43: "landlord_front", 44: "landlord_down"}
 
         position, obs, env_output = env.initial(model, device, flags=flags)