diff --git a/modules/statsbestvouchers/statsbestvouchers.php b/modules/statsbestvouchers/statsbestvouchers.php
index 30a8d3895..909f05c6e 100644
--- a/modules/statsbestvouchers/statsbestvouchers.php
+++ b/modules/statsbestvouchers/statsbestvouchers.php
@@ -121,8 +121,8 @@ class StatsBestVouchers extends ModuleGrid
 		if (Validate::IsName($this->_sort))
 		{
 			$this->_query .= ' ORDER BY `'.$this->_sort.'`';
-			if (isset($this->_direction))
-				$this->_query .= ' '.$this->_direction;
+			if (isset($this->_direction) && (strtoupper($this->_direction) == 'ASC' || strtoupper($this->_direction) == 'DESC'))
+				$this->_query .= ' '.pSQL($this->_direction);
 		}
 		if (($this->_start === 0 || Validate::IsUnsignedInt($this->_start)) && Validate::IsUnsignedInt($this->_limit))
 			$this->_query .= ' LIMIT '.$this->_start.', '.($this->_limit);