diff --git a/libs/community/langchain_community/document_loaders/base_o365.py b/libs/community/langchain_community/document_loaders/base_o365.py
index 4cd341fadde..bbc07b504a8 100644
--- a/libs/community/langchain_community/document_loaders/base_o365.py
+++ b/libs/community/langchain_community/document_loaders/base_o365.py
@@ -60,7 +60,7 @@ def fetch_mime_types(file_types: Sequence[str]) -> Dict[str, str]:
         if mime_type:
             mime_types_mapping[ext] = mime_type
         else:
-            raise ValueError(f"Unknown mimetype of extention {ext}")
+            raise ValueError(f"Unknown mimetype of extension {ext}")
     return mime_types_mapping