diff --git a/Documentation/git-applymbox.txt b/Documentation/git-applymbox.txt
index 3bc92d8cf17297..ea919ba5d7e8a0 100644
--- a/Documentation/git-applymbox.txt
+++ b/Documentation/git-applymbox.txt
@@ -31,7 +31,7 @@ OPTIONS
 	whitespaces, (3) '[' up to ']', typically '[PATCH]', and
 	then prepends "[PATCH] ".  This flag forbids this
 	munging, and is most useful when used to read back 'git
-	format-patch --mbox' output.
+	format-patch -k' output.
 
 -m::
 	Patches are applied with `git-apply` command, and unless
diff --git a/Documentation/git-mailinfo.txt b/Documentation/git-mailinfo.txt
index ba18133ead23b0..8eadcebfcf5c26 100644
--- a/Documentation/git-mailinfo.txt
+++ b/Documentation/git-mailinfo.txt
@@ -30,7 +30,7 @@ OPTIONS
 	whitespaces, (3) '[' up to ']', typically '[PATCH]', and
 	then prepends "[PATCH] ".  This flag forbids this
 	munging, and is most useful when used to read back 'git
-	format-patch --mbox' output.
+	format-patch -k' output.
 
 -u::
 	The commit log message, author name and author email are