diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 9a0308e3f9c..fc252994c76 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -30,6 +30,7 @@ For a list of variables available in the template, please refer to this [page](h
 Code change should conform to the programming style guide of the respective langauages:
 - Android: https://source.android.com/source/code-style.html
 - C#: https://msdn.microsoft.com/en-us/library/vstudio/ff926074.aspx
+- Haskell: https://github.com/tibbe/haskell-style-guide/blob/master/haskell-style.md
 - Java: https://google.github.io/styleguide/javaguide.html
 - JavaScript: https://github.com/airbnb/javascript/tree/master/es5
 - Go: https://github.com/golang/go/wiki/CodeReviewComments