diff --git a/nnn.1 b/nnn.1
index d4a06044..4a42da0a 100644
--- a/nnn.1
+++ b/nnn.1
@@ -148,7 +148,7 @@ supports the following options:
 .Pp
 .Fl "T key"
         sort order
-        keys: 'a'u / 'd'u / 'e'xtension / 'r'everse / 's'ize / 't'ime / 'v'ersion
+        keys: 'a'pparent disk usage / 'd'isk usage / 'e'xtension / 'r'everse / 's'ize / 't'ime / 'v'ersion
         capitalize to reverse (except 'r')
 .Pp
 .Fl u