diff --git a/litellm/litellm_core_utils/streaming_chunk_builder_utils.py b/litellm/litellm_core_utils/streaming_chunk_builder_utils.py
index c808cfca457..d58ded11385 100644
--- a/litellm/litellm_core_utils/streaming_chunk_builder_utils.py
+++ b/litellm/litellm_core_utils/streaming_chunk_builder_utils.py
@@ -587,7 +587,10 @@ class ChunkProcessor:
                     hasattr(usage_chunk, "server_tool_use")
                     and usage_chunk.server_tool_use is not None
                 ):
-                    server_tool_use = usage_chunk.server_tool_use
+                    _stu = usage_chunk.server_tool_use
+                    server_tool_use = (
+                        ServerToolUse(**_stu) if isinstance(_stu, dict) else _stu
+                    )
                 if (
                     usage_chunk_dict["prompt_tokens_details"] is not None
                     and getattr(