diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a77981984..18594c64b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -187,7 +187,10 @@ information.
 This code does not attempt to be indistinguishable from the current Tor
 implementation.
 
-When building the docs with `cargo doc`, use `--all-features`, or you may
-find broken links.  (We welcome fixes to links broken with `--all-features`.)
+When building the docs with `cargo doc`, use `--workspace --all-features`,
+or you may find broken links.
+(We welcome fixes to links broken with `--all-features`.
+`cargo doc --workspace --all-features --document-private-items`
+is also supported, to reveal (unstable) internal information.)
 
 Enjoy hacking on arti!