--- a/bin/pvl.dns-process	Tue Mar 03 12:14:22 2015 +0200
+++ b/bin/pvl.dns-process	Tue Mar 03 12:42:26 2015 +0200
@@ -30,18 +30,20 @@
     options, args = pvl.args.parse(parser, argv)
     
     # process
-    zone = list(pvl.dns.process.apply_zone(options, args))
+    if options.include_trace:
+        include_trace = [ ]
+    else:
+        include_trace = None
+
+    zone = list(pvl.dns.process.apply_zone(options, args,
+            include_trace   = include_trace,
+    ))
 
     if options.serial:
         log.info("Set zone serial: %s", options.serial)
 
         zone = list(pvl.dns.process.zone_serial(zone, options.serial))
 
-    if options.include_trace:
-        include_trace = [ ]
-    else:
-        include_trace = None
-
     if options.include_path:
         log.info("Set zone include path: %s", options.include_path)