diff --git a/htdocs/theme/md/style.css.php b/htdocs/theme/md/style.css.php
index b26bdc4f97c..2789f5c1e36 100644
--- a/htdocs/theme/md/style.css.php
+++ b/htdocs/theme/md/style.css.php
@@ -1912,6 +1912,12 @@ a.tab:link, a.tab:visited, a.tab:hover, a.tab#active {
 	background-image: none !important;
 }
 
+
+.tabunactive {	/* We add some border on tabunactive to avoid change of position of title when switching tabs (border of tabunactive = border of tabactive) */
+    border-right: 1px solid rgb(<?php echo $colorbackbody; ?>);
+    border-left: 1px solid rgb(<?php echo $colorbackbody; ?>);
+}
+
 .tabactive, a.tab#active {
 	color: #<?php echo $colortextbacktab; ?> !important;
 	background: rgb(<?php echo $colorbacktabcard1; ?>) !important;