--- a/lib/DNStools/Config.pm	Sat Jan 22 00:05:44 2011 +0100
+++ b/lib/DNStools/Config.pm	Sun Jan 23 00:21:14 2011 +0100
@@ -12,12 +12,9 @@
 
     # read configuration
     my @configs =
-        @_
-      ? @_
-      : (
-        $ENV{DNSTOOLS_CONF},         "dnstools.conf",
-        "$ENV{HOME}/.dnstools.conf", "/etc/dnstools.conf"
-      );
+        @_                          ? @_
+      : defined $ENV{DNSTOOLS_CONF} ? $ENV{DNSTOOLS_CONF}
+      :   ("dnstools.conf", "$ENV{HOME}/.dnstools.conf", "/etc/dnstools.conf");
     my %config;
 
     # the first config FILE