diff --git a/realhf/impl/model/interface/ppo_interface.py b/realhf/impl/model/interface/ppo_interface.py
index 7e5a71d6..b557f3d7 100755
--- a/realhf/impl/model/interface/ppo_interface.py
+++ b/realhf/impl/model/interface/ppo_interface.py
@@ -267,7 +267,7 @@ def inference(
         # This post_hook will gather log probabilities in mini-batches,
         # reducing peak memory usage.
         def calc_logprobs(logits, input_):
-            logits /= self.generation_config.temperature
+            logits /= self.gconfig.temperature
             if (
                 "packed_logits_mask" in input_.data
                 and input_.data["packed_logits_mask"] is not None