diff --git a/classes/db/DbPDO.php b/classes/db/DbPDO.php
index a73b95c37..d87baa29c 100644
--- a/classes/db/DbPDO.php
+++ b/classes/db/DbPDO.php
@@ -146,8 +146,8 @@ class DbPDOCore extends Db
 	 */
 	public function _escape($str)
 	{
-		$search = array('\\', '\0', '\n', '\r', '\x1a', '"', '\'');
-		$replace = array('\\\\', '\\0', '\\n', '\\r', '\Z', '\\"', '\\\'');
+		$search = array('\\', "\0", "\n", "\r", "\x1a", '\'', '"');
+		$replace = array('\\\\', "\\0", "\\n", "\\r", '\\Z', '\\\'', '\\"');
 
 		return str_replace($search, $replace, $str);
 	}