diff --git a/h2o/filters.php b/h2o/filters.php
index a8cf3d3..30e118e 100644
--- a/h2o/filters.php
+++ b/h2o/filters.php
@@ -26,7 +26,7 @@ static function urlencode($data) {
             foreach ($data as $name => $value) {
                 $result .= $name.'='.urlencode($value).'&'.$querystring;
             }
-            $querystring = substr($result, 0, strlen($result)-1);
+            $querystring = substr($resucalt, 0, strlen($result)-1);
             return htmlspecialchars($result);
         } else {
             return urlencode($data);
@@ -71,7 +71,7 @@ class StringFilters extends FilterCollection {
 
     static function humanize($string) {
         $string = preg_replace('/\s+/', ' ', trim(preg_replace('/[^A-Za-z0-9()!,?$]+/', ' ', $string)));
-        return capfirst($string);
+        return self::capfirst($string);
     }
     
     static function capitalize($string) {