diff --git a/docs/docs/tutorials/pdf_qa.ipynb b/docs/docs/tutorials/pdf_qa.ipynb
index 00b2b4c11c8..e8931ff24c4 100644
--- a/docs/docs/tutorials/pdf_qa.ipynb
+++ b/docs/docs/tutorials/pdf_qa.ipynb
@@ -122,7 +122,7 @@
     "```{=mdx}\n",
     "import ChatModelTabs from \"@theme/ChatModelTabs\";\n",
     "\n",
-    "<ChatModelTabs openaiParams={`model=\"gpt-4o\"`} />\n",
+    "<ChatModelTabs customVarName=\"llm\" openaiParams={`model=\"gpt-4o\"`} />\n",
     "```"
    ]
   },