diff --git a/open_lm/utils/transformers/hf_config.py b/open_lm/utils/transformers/hf_config.py
index fa04515a..edf3839f 100644
--- a/open_lm/utils/transformers/hf_config.py
+++ b/open_lm/utils/transformers/hf_config.py
@@ -40,5 +40,5 @@ def __init__(
 
     def set_params(self, params: Params):
         self.tie_word_embeddings = params.weight_tying
-        for field in fields(params):
+        for field in fields(Params):
             setattr(self, field.name, getattr(params, field.name))