diff --git a/sbin/mdconfig/mdconfig.8 b/sbin/mdconfig/mdconfig.8
index 7c053dd148fc..0b97ddf1c120 100644
--- a/sbin/mdconfig/mdconfig.8
+++ b/sbin/mdconfig/mdconfig.8
@@ -118,7 +118,7 @@ md prefix.
 .It Fl s Ar size
 Size of the memory disk.
 .Ar Size
-is the number of 512 bytes sectors unless suffixed with a
+is the number of 512 byte sectors unless suffixed with a
 .Cm k , m ,
 or
 .Cm g