diff --git a/man2/mount.2 b/man2/mount.2
index 57d01d4de..c130b85bd 100644
--- a/man2/mount.2
+++ b/man2/mount.2
@@ -79,6 +79,7 @@ understood by this filesystem.
 See
 .BR mount (8)
 for details of the options available for each filesystem type.
+This argument may be specified as NULL, if there are no options.
 .PP
 A call to
 .BR mount ()