diff --git a/docs/manifest_submodule.txt b/docs/manifest_submodule.txt
index e7d1f64..1718284 100644
--- a/docs/manifest_submodule.txt
+++ b/docs/manifest_submodule.txt
@@ -76,6 +76,12 @@
 
 This key is not supported by repo.  If set, it will be ignored.
 
+repo.notice
+-----------
+
+A message displayed when repo sync uses this manifest.
+
+
 .review
 =======