diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt
index 50bbff7f0a..55ddf33e8e 100644
--- a/Documentation/rev-list-options.txt
+++ b/Documentation/rev-list-options.txt
@@ -271,8 +271,8 @@ See also linkgit:git-reflog[1].
 
 --boundary::
 
-	Output uninteresting commits at the boundary, which are usually
-	not shown.
+	Output excluded boundary commits. Boundary commits are
+	prefixed with `-`.
 
 --