diff --git a/Smarty.class.php b/Smarty.class.php
index 18a4b8d2..1d8bc4e2 100644
--- a/Smarty.class.php
+++ b/Smarty.class.php
@@ -523,7 +523,7 @@ class Smarty
         global $HTTP_SERVER_VARS, $QUERY_STRING, $HTTP_COOKIE_VARS;
 
         if (!$this->debugging && $this->debugging_ctrl == 'URL'
-               && strstr($QUERY_STRING, $this->_smarty_debug_id))) {
+               && strstr($QUERY_STRING, $this->_smarty_debug_id)) {
             $this->debugging = true;
         }
 
diff --git a/libs/Smarty.class.php b/libs/Smarty.class.php
index 18a4b8d2..1d8bc4e2 100644
--- a/libs/Smarty.class.php
+++ b/libs/Smarty.class.php
@@ -523,7 +523,7 @@ class Smarty
         global $HTTP_SERVER_VARS, $QUERY_STRING, $HTTP_COOKIE_VARS;
 
         if (!$this->debugging && $this->debugging_ctrl == 'URL'
-               && strstr($QUERY_STRING, $this->_smarty_debug_id))) {
+               && strstr($QUERY_STRING, $this->_smarty_debug_id)) {
             $this->debugging = true;
         }