diff --git a/tools/tools/tinderbox/www/index.cgi b/tools/tools/tinderbox/www/index.cgi
index 72e4debad52..12ad03d804f 100644
--- a/tools/tools/tinderbox/www/index.cgi
+++ b/tools/tools/tinderbox/www/index.cgi
@@ -29,6 +29,7 @@
 # $FreeBSD$
 #
 
+use 5.006_001;
 use strict;
 use POSIX qw(strftime);