diff --git a/.ng-dev/config.ts b/.ng-dev/config.ts
index 03a0437120..ab65c9131e 100644
--- a/.ng-dev/config.ts
+++ b/.ng-dev/config.ts
@@ -107,6 +107,7 @@ const merge = () => {
     requiredBaseCommits: {
       // PRs that target either `master` or the patch branch, need to be rebased
       // on top of the latest commit message validation fix.
+      // These SHAs are the commits that update the required license text in the header.
       'master': '5aeb9a4124922d8ac08eb73b8f322905a32b0b3a',
       [patch]: '27b95ba64a5d99757f4042073fd1860e20e3ed24'
     },