diff --git a/libs/prebuilt/langgraph/prebuilt/tool_node.py b/libs/prebuilt/langgraph/prebuilt/tool_node.py
index c5c280b2b..40bdb116c 100644
--- a/libs/prebuilt/langgraph/prebuilt/tool_node.py
+++ b/libs/prebuilt/langgraph/prebuilt/tool_node.py
@@ -1315,3 +1315,4 @@ def _get_runtime_arg(tool: BaseTool) -> Optional[str]:
 
 
 
+