diff --git a/docs/docs/tutorials/rag.ipynb b/docs/docs/tutorials/rag.ipynb
index a4601ce3a21..189c650346f 100644
--- a/docs/docs/tutorials/rag.ipynb
+++ b/docs/docs/tutorials/rag.ipynb
@@ -234,6 +234,8 @@
     "_ = vector_store.add_documents(documents=all_splits)\n",
     "\n",
     "# Define prompt for question-answering\n",
+    "# N.B. for non-US LangSmith endpoints, you may need to specify\n",
+    "# api_url=\"https://api.smith.langchain.com\" in hub.pull.\n",
     "prompt = hub.pull(\"rlm/rag-prompt\")\n",
     "\n",
     "\n",
@@ -535,7 +537,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 10,
+   "execution_count": null,
    "id": "46f378c5-858c-488f-8aef-8b59a6280791",
    "metadata": {},
    "outputs": [
@@ -553,6 +555,8 @@
    "source": [
     "from langchain import hub\n",
     "\n",
+    "# N.B. for non-US LangSmith endpoints, you may need to specify\n",
+    "# api_url=\"https://api.smith.langchain.com\" in hub.pull.\n",
     "prompt = hub.pull(\"rlm/rag-prompt\")\n",
     "\n",
     "example_messages = prompt.invoke(\n",