diff --git a/src/doc/rustc-dev-guide/README.md b/src/doc/rustc-dev-guide/README.md
index 352c4ce0ba5a..7e468fbb0db9 100644
--- a/src/doc/rustc-dev-guide/README.md
+++ b/src/doc/rustc-dev-guide/README.md
@@ -33,3 +33,5 @@ be found.
 ```
 $ cargo install mdbook-linkcheck
 ```
+You will need `mdbook` version `>= 0.1`. `linkcheck` will be run automatically
+when you run `mdbook build`.