diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 3d6ae53fcb4..67dabb029b7 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -53,6 +53,7 @@ Code change should conform to the programming style guide of the respective lang
 - Perl: http://perldoc.perl.org/perlstyle.html
 - PHP: https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md
 - Python: https://www.python.org/dev/peps/pep-0008/
+- R: https://google.github.io/styleguide/Rguide.xml
 - Ruby: https://github.com/bbatsov/ruby-style-guide
 - Scala: http://docs.scala-lang.org/style/
 - Swift: https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/Swift_Programming_Language/TheBasics.html