diff --git a/Documentation/revisions.txt b/Documentation/revisions.txt
index 1ad95065c1..d9169c062e 100644
--- a/Documentation/revisions.txt
+++ b/Documentation/revisions.txt
@@ -254,6 +254,9 @@ specifying a single revision, using the notation described in the
 previous section, means the set of commits `reachable` from the given
 commit.
 
+Specifying several revisions means the set of commits reachable from
+any of the given commits.
+
 A commit's reachable set is the commit itself and the commits in
 its ancestry chain.