diff --git a/games/grdc/grdc.6 b/games/grdc/grdc.6
index e9beaf745e3b..5226a6b2a9c7 100644
--- a/games/grdc/grdc.6
+++ b/games/grdc/grdc.6
@@ -7,8 +7,7 @@
 .Nd grand digital clock (curses)
 .Sh SYNOPSIS
 .Nm
-.Op Fl s
-.Op Fl t
+.Op Fl st
 .Op Ar n
 .Sh DESCRIPTION
 .Nm