diff --git a/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_util.py b/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_util.py
index 2c68f0a5d9696..8f0214ee7a25e 100644
--- a/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_util.py
+++ b/sdk/ml/azure-ai-ml/azure/ai/ml/entities/_util.py
@@ -197,7 +197,7 @@ def is_empty_target(obj):
     )
 
 
-def convert_ordered_dict_to_dict(target_object: Union[Dict, List], remove_empty=True) -> Union[Dict, List]:
+def convert_ordered_dict_to_dict(target_object: Union[Dict, List, Any], remove_empty=True) -> Union[Dict, List, Any]:
     """Convert ordered dict to dict. Remove keys with None value.
     This is a workaround for rest request must be in dict instead of
     ordered dict.
@@ -217,6 +217,10 @@ def convert_ordered_dict_to_dict(target_object: Union[Dict, List], remove_empty=
             if not is_empty_target(value) or not remove_empty:
                 new_dict[key] = value
         return new_dict
+    from azure.ai.ml.entities._job.pipeline._io import PipelineInput
+
+    if isinstance(target_object, PipelineInput):
+        return str(target_object)
     return target_object