diff --git a/llama_stack/providers/inline/post_training/huggingface/config.py b/llama_stack/providers/inline/post_training/huggingface/config.py
index 04e286ff0..9b1431e98 100644
--- a/llama_stack/providers/inline/post_training/huggingface/config.py
+++ b/llama_stack/providers/inline/post_training/huggingface/config.py
@@ -71,7 +71,7 @@ class HuggingFacePostTrainingConfig(BaseModel):
     dpo_beta: float = 0.1
     use_reference_model: bool = True
     dpo_loss_type: Literal["sigmoid", "hinge", "ipo", "kto_pair"] = "sigmoid"
-    dpo_output_dir: str
+    dpo_output_dir: str = ""
 
     @classmethod
     def sample_run_config(cls, __distro_dir__: str, **kwargs: Any) -> dict[str, Any]: