diff --git a/docs/how_to_guides/using_llms.md b/docs/how_to_guides/using_llms.md
index 4e99201f2..1c038de89 100644
--- a/docs/how_to_guides/using_llms.md
+++ b/docs/how_to_guides/using_llms.md
@@ -63,7 +63,7 @@ guard = Guard.from_pydantic(Basket)
 result = guard(
     messages=[{"role":"user", "content":"Generate a basket of 5 fruits"}],
     model="gpt-4o",
-    tools=guard.add_json_function_calling_tool([]),
+    tools=guard.json_function_calling_tool([]),
     tool_choice="required",
 )
 
@@ -248,4 +248,4 @@ print(f"{result.validated_output}")
 
 ## Other LLMs
 
-See LiteLLM’s documentation [here](https://docs.litellm.ai/docs/providers) for details on many other llms.
\ No newline at end of file
+See LiteLLM’s documentation [here](https://docs.litellm.ai/docs/providers) for details on many other llms.