diff --git a/src/about-this-guide.md b/src/about-this-guide.md
index df060a208..48ea4dce6 100644
--- a/src/about-this-guide.md
+++ b/src/about-this-guide.md
@@ -3,7 +3,7 @@
 This guide is meant to help document how rustc – the Rust compiler –
 works, as well as to help new contributors get involved in rustc
 development. It is not meant to replace code documentation – each
-chapter gives only high-level details – the kinds of things that
+chapter gives only high-level details, the kinds of things that
 (ideally) don't change frequently.
 
 There are three parts to this guide. Part 1 contains information that should