Index: lpr.c
===================================================================
--- lpr.c	(revision 1956)
+++ lpr.c	(revision 1957)
@@ -114,6 +114,14 @@
 
 static HID lpr_hid;
 
+static int lpr_usage(char *topic)
+{
+	fprintf(stderr, "\nlpr exporter command line arguments:\n\n");
+	hid_usage(base_lpr_options, sizeof(base_lpr_options) / sizeof(base_lpr_options[0]));
+	fprintf(stderr, "\nUsage: pcb-rnd [generic_options] -x lpr foo.pcb [lpr options]\n\n");
+	return 0;
+}
+
 static void plugin_lpr_uninit(void)
 {
 	hid_remove_actions_by_cookie(lpr_cookie);
@@ -137,6 +145,8 @@
 	lpr_hid.parse_arguments = lpr_parse_arguments;
 	lpr_hid.calibrate = lpr_calibrate;
 
+	lpr_hid.usage = lpr_usage;
+
 	hid_register_hid(&lpr_hid);
 
 	return plugin_lpr_uninit;