diff --git a/src/doc/book/type-aliases.md b/src/doc/book/type-aliases.md
index def2e31f3514b..3798336f0a524 100644
--- a/src/doc/book/type-aliases.md
+++ b/src/doc/book/type-aliases.md
@@ -1,4 +1,4 @@
-% `type` Aliases
+% Type Aliases
 
 The `type` keyword lets you declare an alias of another type: