diff --git a/ls.1 b/ls.1
index 0c61721..1c01d13 100644
--- a/ls.1
+++ b/ls.1
@@ -3,7 +3,7 @@
 ls \- list directory contents
 .SH SYNOPSIS
 .B ls
-.RB [ \-adiltU ]
+.RB [ \-adFiltU ]
 .RI [ file ...]
 .SH DESCRIPTION
 .B ls
@@ -17,6 +17,9 @@ shows hidden files (those beginning with '.').
 .B \-d
 lists directories themselves, not their contents.
 .TP
+.B \-F
+append a file type indicator to files.
+.TP
 .B \-i
 print the index number of each file.
 .TP