diff --git a/dmenu.1 b/dmenu.1
index 323f93c..d511148 100644
--- a/dmenu.1
+++ b/dmenu.1
@@ -22,6 +22,10 @@ dmenu \- dynamic menu
 .IR color ]
 .RB [ \-w
 .IR windowid ]
+.RB [ \-d
+.IR separator ]
+.RB [ \-D
+.IR separator ]
 .P
 .BR dmenu_run " ..."
 .SH DESCRIPTION
@@ -80,6 +84,14 @@ prints version information to stdout, then exits.
 .TP
 .BI \-w " windowid"
 embed into windowid.
+.TP
+.BI \-d " separator"
+separate the input into two halves on the first occurrence of the given charcter.
+Display only the first half in dmenu and print the second half to stdout upon selection.
+Appending '|' to the separator reverses the display/printing order.
+.TP
+.BI \-D " separator"
+same as \-d but separate based on the last occurrence.
 .SH USAGE
 dmenu is completely controlled by the keyboard.  Items are selected using the
 arrow keys, page up, page down, home, and end.