diff --git a/Documentation/SubmittingPatches b/Documentation/SubmittingPatches
index 38e18982aa..4a37bc29f5 100644
--- a/Documentation/SubmittingPatches
+++ b/Documentation/SubmittingPatches
@@ -465,6 +465,10 @@ These are the common trailers in use:
   and found it to have the desired effect.
 . `Co-authored-by:` is used to indicate that people exchanged drafts
    of a patch before submitting it.
+. `Based-on-patch-by:` is used when someone else authored parts of the
+  patch that you are submitting. This might be relevant if someone sent
+  a patch to the mailing list with their sign-off. (Be mindful and ask
+  them to sign off on it if they did not.)
 . `Helped-by:` is used to credit someone who suggested ideas for
   changes without providing the precise changes in patch form.
 . `Mentored-by:` is used to credit someone with helping develop a