diff --git a/libs/plugins/function.mailto.php b/libs/plugins/function.mailto.php
index 92bb9d3b..94d797d7 100644
--- a/libs/plugins/function.mailto.php
+++ b/libs/plugins/function.mailto.php
@@ -114,6 +114,7 @@ function smarty_function_mailto($params, &$smarty)
             $smarty->trigger_error("mailto: hex encoding does not work with extra attributes. Try javascript.");
             return;
         }
+        $address_encode = '';
         for ($x=0; $x < strlen($address); $x++) {
             if(preg_match('!\w!',$address[$x])) {
                 $address_encode .= '%' . bin2hex($address[$x]);
@@ -121,6 +122,7 @@ function smarty_function_mailto($params, &$smarty)
                 $address_encode .= $address[$x];
             }
         }
+        $text_encode = '';
         for ($x=0; $x < strlen($text); $x++) {
             $text_encode .= '&#x' . bin2hex($text[$x]).';';
         }