diff --git a/deepmd/pt/infer/deep_eval.py b/deepmd/pt/infer/deep_eval.py
index 89bb8a0286..59b833d34c 100644
--- a/deepmd/pt/infer/deep_eval.py
+++ b/deepmd/pt/infer/deep_eval.py
@@ -143,6 +143,7 @@ def __init__(
                 self.model_def_script = {}
         else:
             raise ValueError("Unknown model file format!")
+        self.dp.eval()
         self.rcut = self.dp.model["Default"].get_rcut()
         self.type_map = self.dp.model["Default"].get_type_map()
         if isinstance(auto_batch_size, bool):