diff --git a/htdocs/theme/md/style.css.php b/htdocs/theme/md/style.css.php
index 3b67c895e0d..2ec97ec7a9d 100644
--- a/htdocs/theme/md/style.css.php
+++ b/htdocs/theme/md/style.css.php
@@ -1205,6 +1205,13 @@ td.showDragHandle {
 .side-nav-vert {
 	margin-left: 228px;
 }
+<?php if (empty($conf->global->THEME_DISABLE_STICKY_TOPMENU)) {  ?>
+.side-nav-vert {
+	position: sticky;
+	top: 0px;
+	z-index: 210;
+}
+<?php } ?>
 
 /* For smartphone (testmenuhider is on) */
 <?php if (in_array($conf->browser->layout, array('phone','tablet')) && ((GETPOST('testmenuhider') || ! empty($conf->global->MAIN_TESTMENUHIDER)) && empty($conf->global->MAIN_OPTIMIZEFORTEXTBROWSER))) { ?>