diff --git a/libs/prebuilt/langgraph/prebuilt/tool_node.py b/libs/prebuilt/langgraph/prebuilt/tool_node.py
index 6c2d35df7..c266684be 100644
--- a/libs/prebuilt/langgraph/prebuilt/tool_node.py
+++ b/libs/prebuilt/langgraph/prebuilt/tool_node.py
@@ -1341,3 +1341,4 @@ def _get_runtime_arg(tool: BaseTool) -> Optional[str]:
 
 
 
+