diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 2ba61e2a6..41606a7c6 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -14,6 +14,7 @@ We actively welcome your pull requests. If you are planning on doing a larger ch
 4. Ensure the test suite passes, your code lints and typechecks. Your pull request might not get the attention it deserves if it fails in our automated continuous integration system.
 5. If you haven't already, complete the Contributor License Agreement ("CLA").
 6. Consider quashing your commits (`git rebase -i`). One intent alongside one commit makes it clearer for people to review and easier to understand your intention.
+7. The main comment of a pull request must start with a sentence to be used in release notes prefixed with "Release Note: ". If the change is negligible, say "Release Note: none".
 
 ## Copyright Notice for files
 
@@ -53,4 +54,4 @@ ensure that you copy+paste the relevant section number and individual steps.
 
 ## License
 By contributing to Prepack, you agree that your contributions will be licensed
-under the LICENSE file in the root directory of this source tree.
\ No newline at end of file
+under the LICENSE file in the root directory of this source tree.