diff --git a/guide/src/format/summary.md b/guide/src/format/summary.md
index 166e16b1..f98b05fd 100644
--- a/guide/src/format/summary.md
+++ b/guide/src/format/summary.md
@@ -36,7 +36,7 @@ allow for easy parsing. Let's see how you should format your `SUMMARY.md` file.
 
    - [Title of the first  Chapter](relative/path/to/markdown.md)
    - [Title of the second Chapter](relative/path/to/markdown2.md)
-      * [Title of a sub Chapter](relative/path/to/markdown3.md)
+      - [Title of a sub Chapter](relative/path/to/markdown3.md)
 
 
    # Title of Another Part