diff --git a/tdir.1 b/tdir.1
index 3c49aa4..8da8218 100644
--- a/tdir.1
+++ b/tdir.1
@@ -32,6 +32,10 @@
 .B -d
 Suppress display of directories
 .TP
+.B -e
+Suppress sorting files by extension.  Display full file name
+in alphabetic order beneath the directory display.
+.TP
 .B -f
 Suppress display of files
 .TP