diff --git a/python/sglang/srt/function_call_parser.py b/python/sglang/srt/function_call_parser.py
index 4ae8d0a0d01..b0f903755c5 100644
--- a/python/sglang/srt/function_call_parser.py
+++ b/python/sglang/srt/function_call_parser.py
@@ -287,7 +287,6 @@ def parse_streaming_increment(
                             calls=[
                                 ToolCallItem(
                                     tool_index=self.current_tool_id,
-                                    name="",
                                     parameters=argument_diff,
                                 )
                             ],