diff --git a/interface/lib/classes/db_mysql.inc.php b/interface/lib/classes/db_mysql.inc.php
index bcf1b008a213abc867a5550cd569ad2af233df63..d4ba79c5926583b6a7db30aec11b0a7faf78a145 100644
--- a/interface/lib/classes/db_mysql.inc.php
+++ b/interface/lib/classes/db_mysql.inc.php
@@ -135,7 +135,7 @@ class db extends mysqli
 				$string_orig = $string;
 				
 				//echo $string;
-				$chars = array(';', '#', '/*', '*/', '--', ' UNION ', '\\\'', '\\"');
+				$chars = array(';', '#', '/*', '*/', '--', '\\\'', '\\"');
 		
 				$string = str_replace('\\\\', '', $string);
 				$string = preg_replace('/(^|[^\\\])([\'"])\\2/is', '$1', $string);