diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index e1c15fea0e7bdf9942e8fcb0d4587daa87496869..effc5838746dea6071ca6746eb06cfcb9d3d772a 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -1622,7 +1622,7 @@ function format_string($string, array $args = array()) {
  * @ingroup sanitization
  */
 function check_plain($text) {
-  return htmlspecialchars($text, ENT_QUOTES, 'UTF-8');
+  return htmlspecialchars($text, ENT_QUOTES, 'UTF-8', FALSE);
 }
 
 /**