diff --git a/usr/local/www/system_advanced_misc.php b/usr/local/www/system_advanced_misc.php
index 0d00453672..b3ed759202 100644
--- a/usr/local/www/system_advanced_misc.php
+++ b/usr/local/www/system_advanced_misc.php
@@ -74,7 +74,7 @@ $pconfig['use_mfs_tmpvar'] = isset($config['system']['use_mfs_tmpvar']);
 $pconfig['use_mfs_tmp_size'] = $config['system']['use_mfs_tmp_size'];
 $pconfig['use_mfs_var_size'] = $config['system']['use_mfs_var_size'];
 $pconfig['noinstalllanspd'] = $config['system']['noinstalllanspd'];
-$pconfig['pkg_nochecksig'] = $config['system']['pkg_nochecksig'];
+$pconfig['pkg_nochecksig'] = isset($config['system']['pkg_nochecksig']);
 
 $pconfig['powerd_ac_mode'] = "hadp";
 if (!empty($config['system']['powerd_ac_mode']))
@@ -191,7 +191,7 @@ if ($_POST) {
 
 		if($_POST['pkg_nochecksig'] == "yes")
 			$config['system']['pkg_nochecksig'] = true;
-		else
+		elseif (isset($config['system']['pkg_nochecksig']))
 			unset($config['system']['pkg_nochecksig']);
 
 		if($_POST['maxmss_enable'] == "yes") {
@@ -710,7 +710,7 @@ function tmpvar_checked(obj) {
 							<tr>
 								<td width="22%" valign="top" class="vncell"><?=gettext("Packages signature"); ?></td>
 								<td width="78%" class="vtable">
-									<input name="pkg_nochecksig" type="checkbox" id="pkg_nochecksig" value="yes" <?php if ($pconfig['pkg_nochecksig']) echo "checked=\"checked\""; ?> onclick="tmpvar_checked(this)" />
+									<input name="pkg_nochecksig" type="checkbox" id="pkg_nochecksig" value="yes" <?php if ($pconfig['pkg_nochecksig']) echo "checked=\"checked\""; ?> />
 									<strong><?=gettext("Do NOT check packages signature"); ?></strong><br/>
 									<?=gettext("Enable this option will make pfSense install any packages without check its signature."); ?>
 								</td>