--- mantisbt-2.1.0/core/layout_api.php	2017-01-31 09:53:59.000000000 +0100
+++ mantisbt-2.1.0-fix/core/layout_api.php	2017-02-17 11:02:37.945723377 +0100
@@ -917,7 +917,8 @@
  */
 function layout_sidebar_menu( $p_page, $p_title, $p_icon, $p_active_sidebar_page = null ) {
 	if( $p_page == $p_active_sidebar_page ||
-		$p_page == basename( $_SERVER['SCRIPT_NAME'] ) ) {
+		$p_page == basename( $_SERVER['SCRIPT_NAME'] ) ||
+		$p_page == plugin_page( basename( $p_active_sidebar_page ) ) ) {
 		echo '<li class="active">' . "\n";
 	} else {
 		echo '<li>' . "\n";