diff --git a/data/zenity.1 b/data/zenity.1
index 06a1aba..8b957fa 100644
--- a/data/zenity.1
+++ b/data/zenity.1
@@ -79,6 +79,9 @@ Set the dialog title
 .B \-\-window-icon=ICONPATH
 Set the window icon with the path to an image. Alternatively, one of the four stock icons can be used: 'error', 'info', 'question' or 'warning'
 .TP
+.B \-\-icon-name=ICONNAME
+The name of the icon to display on the dialog to override the default stock icons
+.TP
 .B \-\-width=WIDTH
 Set the dialog width
 .TP