diff -Naur a/kernel/timeconst.pl b/kernel/timeconst.pl
--- a/kernel/timeconst.pl	2013-11-29 03:09:36.000000000 +0100
+++ b/kernel/timeconst.pl	2019-05-26 00:21:42.701338888 +0200
@@ -370,7 +370,7 @@
 	}
 
 	@val = @{$canned_values{$hz}};
-	if (!defined(@val)) {
+	if (!@val) {
 		@val = compute_values($hz);
 	}
 	output($hz, @val);