--- a/tt.c	Mon Mar 15 23:56:17 2010 +0100
+++ b/tt.c	Tue Mar 16 23:00:36 2010 +0100
@@ -374,7 +374,7 @@
 void show_help(const char *prog)
 {
     printf(
-	    "Usage: %s [-d] [-l] [-t]\n"
+	    "Usage: %s <-s|-l|-t|-h>\n"
         "       %s <task>\n"
         "Manual:\n"
         "  Switch to a task         :  tt mytask\n"