diff -r -u a/server.c b/server.c
--- a/server.c	2019-05-24 15:14:11.000000000 +0300
+++ b/server.c	2019-10-25 01:24:02.313539391 +0300
@@ -1440,7 +1440,7 @@
 
 void display_usage (void)
 {
-	fprintf (stderr,"%s",irtrans_usage);
+	fprintf (stdout,"%s\n",irtrans_usage);
 	exit (1);
 }