diff --git a/trl/trainer/orpo_trainer.py b/trl/trainer/orpo_trainer.py
index f84d4fcbb7..dfc78fbee2 100644
--- a/trl/trainer/orpo_trainer.py
+++ b/trl/trainer/orpo_trainer.py
@@ -1129,10 +1129,10 @@ def create_model_card(
         Creates a draft of a model card using the information available to the `Trainer`.
 
         Args:
-            model_name (`str`, *optional*, defaults to `None`):
-                The name of the model.
-            dataset_name (`str`, *optional*, defaults to `None`):
-                The name of the dataset used for training.
+            model_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the model.
+            dataset_name (`str` or `None`, *optional*, defaults to `None`):
+                Name of the dataset used for training.
             tags (`str`, `list[str]` or `None`, *optional*, defaults to `None`):
                 Tags to be associated with the model card.
         """