diff --git a/guide/src/format/summary.md b/guide/src/format/summary.md
index 0bb06a99..0e138529 100644
--- a/guide/src/format/summary.md
+++ b/guide/src/format/summary.md
@@ -35,7 +35,7 @@ to be ignored at best, or may cause an error when attempting to build the book.
    Titles are optional, and the numbered chapters can be broken into as many
    parts as desired.
    ```markdown
-   # My Part Tile
+   # My Part Title
 
    - [First Chapter](relative/path/to/markdown.md)
    ```