--- a/log.pl	Tue Jan 06 11:56:20 2015 +0100
+++ b/log.pl	Tue Jan 13 09:45:57 2015 +0100
@@ -67,7 +67,7 @@
 package config {
     # default values if not set in the config file
     our $db //= 1;
-    our $logfile = "/root/LOG.$NODENAME";
+    our $logfile //= "/root/LOG.$NODENAME";
 }
 
 my $opt_db      = $config::db;