diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index ffdf2dd4b81dad..c112806acf4d6f 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,4 +1,5 @@
-Please see the [official issue tracker] and wiki [HowToContribute].
+Please see the [official issue tracker], [doc/contributing.rdoc] and wiki [HowToContribute].
 
 [official issue tracker]: https://bugs.ruby-lang.org
+[doc/contributing.rdoc]: doc/contributing.rdoc
 [HowToContribute]: https://bugs.ruby-lang.org/projects/ruby/wiki/HowToContribute