diff --git a/module/dca/tl_leaflet_map.php b/module/dca/tl_leaflet_map.php
index 4b3c428..2af0667 100644
--- a/module/dca/tl_leaflet_map.php
+++ b/module/dca/tl_leaflet_map.php
@@ -577,8 +577,8 @@ $GLOBALS['TL_DCA']['tl_leaflet_map'] = array
             'label'     => &$GLOBALS['TL_LANG']['tl_leaflet_map']['cacheLifeTime'],
             'exclude'   => true,
             'inputType' => 'text',
-            'default'   => null,
-            'eval'      => array('maxlength' => 5, 'rgxp' => 'digit', 'tl_class' => 'w50', 'nullIfEmpty' => true),
+            'default'   => 0,
+            'eval'      => array('maxlength' => 5, 'rgxp' => 'digit', 'tl_class' => 'w50'),
             'sql'       => "int(9) NOT NULL default '0'"
         ),
     ),