diff --git a/src/doc/rustc-dev-guide/book.toml b/src/doc/rustc-dev-guide/book.toml
index ecbe513b7cbe..8c13fa1aa3c6 100644
--- a/src/doc/rustc-dev-guide/book.toml
+++ b/src/doc/rustc-dev-guide/book.toml
@@ -5,6 +5,7 @@ description = "A guide to developing rustc"
 
 [output.html]
 
-[output.linkcheck]
-
 [output.html.search]
+
+[output.linkcheck]
+follow-web-links = true