diff --git a/src/doc/rustc-dev-guide/book.toml b/src/doc/rustc-dev-guide/book.toml
index f3a192c67844..ecbe513b7cbe 100644
--- a/src/doc/rustc-dev-guide/book.toml
+++ b/src/doc/rustc-dev-guide/book.toml
@@ -1,7 +1,7 @@
 [book]
 title = "Guide to Rustc Development"
 author = "Rustc developers"
-description = "A guide to developing rustc "
+description = "A guide to developing rustc"
 
 [output.html]