diff --git a/scripts/decode_bug.php3 b/scripts/decode_bug.php3
index 5aa0211df..310da9855 100644
--- a/scripts/decode_bug.php3
+++ b/scripts/decode_bug.php3
@@ -68,7 +68,7 @@
  */
 function PMA_printDecodedBug($textdata)
 {
-    return '<pre>' . $textdata . '</pre><br />';
+    return '<pre>' . htmlspecialchars($textdata) . '</pre><br />';
 } // end of the "PMA_printDecodedBug()" function