1 files changed, 1 insertions, 0 deletions
diff --git a/src/book/mod.rs b/src/book/mod.rs
index 5711eb5e..67c3491e 100644
--- a/src/book/mod.rs
+++ b/src/book/mod.rs
@@ -132,6 +132,7 @@ impl MDBook {
     ///     match *item {
     ///         BookItem::Chapter(ref chapter) => {},
     ///         BookItem::Separator => {},
+    ///         BookItem::PartTitle(ref title) => {}
     ///     }
     /// }
     ///