diff --git a/Shorewall/Perl/Shorewall/Config.pm b/Shorewall/Perl/Shorewall/Config.pm
index ac948ce17..82d4f8263 100644
--- a/Shorewall/Perl/Shorewall/Config.pm
+++ b/Shorewall/Perl/Shorewall/Config.pm
@@ -5377,7 +5377,7 @@ sub update_config_file( $ ) {
     update_default( 'PAGER',             $shorewallrc1{DEFAULT_PAGER} );
     update_default( 'LOGFORMAT',         'Shorewall:%s:%s:' );
     update_default( 'LOGLIMIT',          '' );
-    update_default( 'USE_NFLOG_SIZE',    '' );
+    update_default( 'USE_NFLOG_SIZE',    'No' );
 
     if ( $family == F_IPV4 ) {
 	update_default( 'BLACKLIST_DEFAULT', 'dropBcasts,dropNotSyn,dropInvalid' );