diff --git a/js/navigation.js b/js/navigation.js
index 218c69c0da..93e65389ad 100644
--- a/js/navigation.js
+++ b/js/navigation.js
@@ -704,7 +704,7 @@ PMA_fastFilter.filter.prototype.request = function ()
         }
         var url = $('#pma_navigation').find('a.navigation_url').attr('href');
         var results = that.$this.find('li:visible:not(.fast_filter)').length;
-        var params = that.$this.find('form').serialize() + "&results=" + results;
+        var params = that.$this.find('form.fast_filter').serialize() + "&results=" + results;
         that.xhr = $.ajax({
             url: url,
             type: 'post',
diff --git a/libraries/navigation/NavigationTree.class.php b/libraries/navigation/NavigationTree.class.php
index da47af3127..a3c5562777 100644
--- a/libraries/navigation/NavigationTree.class.php
+++ b/libraries/navigation/NavigationTree.class.php
@@ -810,7 +810,7 @@ class PMA_NavigationTree {
                 'pos2_value' => 0
             );
             $retval .= "<li class='fast_filter'>";
-            $retval .= "<form class='ajax'>";
+            $retval .= "<form class='ajax fast_filter'>";
             $retval .= PMA_getHiddenFields($url_params);
             $retval .= "<input class='searchClause' name='searchClause' value='" . __('filter tables by name') . "' />";
             $retval .= "<span title='" . __('Clear Fast Filter') . "'>X</span>";