diff --git a/pw.1 b/pw.1
index 1dbcaf4..0a51a07 100644
--- a/pw.1
+++ b/pw.1
@@ -11,10 +11,11 @@
 .Nm
 .Fl h | v
 .Nm
-.Fl Op d
-.Fl Op l
-.Fl Op u
-.Fl Op s
+.Op Fl d
+.Op Fl l
+.Op Fl u
+.Op Fl s
+.Op Fl c Ar length
 .Sh DESCRIPTION
 The
 .Nm