diff --git a/docs/extras/modules/chains/how_to/custom_chain.ipynb b/docs/extras/modules/chains/how_to/custom_chain.ipynb
index 9034e005966..59ce061fe9c 100644
--- a/docs/extras/modules/chains/how_to/custom_chain.ipynb
+++ b/docs/extras/modules/chains/how_to/custom_chain.ipynb
@@ -28,7 +28,7 @@
     "\n",
     "from pydantic import Extra\n",
     "\n",
-    "from langchain.schemea import BaseLanguageModel\n",
+    "from langchain.schema import BaseLanguageModel\n",
     "from langchain.callbacks.manager import (\n",
     "    AsyncCallbackManagerForChainRun,\n",
     "    CallbackManagerForChainRun,\n",