diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index aa3c1e082a..fdb924cdff 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -27,7 +27,7 @@ facilitates social contribution, easy testing and peer review.
 
 To contribute a patch, the workflow is as follows:
 
-  1. Fork repository
+  1. Fork repository ([only the first time](https://help.github.com/en/articles/fork-a-repo)).
   1. Create topic branch
   1. Commit patches