diff --git a/database/mysql/mode/tablessize.pm b/database/mysql/mode/tablessize.pm
index 3a93c93a1..4fe8f75ab 100644
--- a/database/mysql/mode/tablessize.pm
+++ b/database/mysql/mode/tablessize.pm
@@ -37,7 +37,7 @@ sub new {
                                   "critical:s"              => { name => 'critical', },
                                   "db-table:s@"              => { name => 'db_table', },
                                 });
-
+    $self->{filter} = {};
     return $self;
 }