diff --git a/src/subrelayd.c b/src/subrelayd.c
index e167e96..91c93fa 100644
--- a/src/subrelayd.c
+++ b/src/subrelayd.c
@@ -79,7 +79,7 @@ static int drop_privileges(const char *username, const char *groupname)
 
 static void print_usage(const char *progname)
 {
-  printf("Usage: %s -c <config_file> [-d]\n", progname);
+  printf("Usage: %s -c <config_file> [-f]\n", progname);
   printf("  -c|--config-file <path>  Path to subrelay configuration file\n");
   printf("  -f|--foreground          Run in foreground mode\n");
   printf("  -h|--help                Print help\n");