diff --git a/themes/luci-theme-bootstrap/htdocs/luci-static/bootstrap/cascade.css b/themes/luci-theme-bootstrap/htdocs/luci-static/bootstrap/cascade.css
index 344364ae05..c98eb84e0b 100644
--- a/themes/luci-theme-bootstrap/htdocs/luci-static/bootstrap/cascade.css
+++ b/themes/luci-theme-bootstrap/htdocs/luci-static/bootstrap/cascade.css
@@ -863,7 +863,7 @@ header {
 	background-repeat: repeat-x;
 	background-image: linear-gradient(to bottom, #333333, #222222);
 	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25), inset 0 -1px 0 rgba(0, 0, 0, 0.1);
-	padding: 0 5px;
+	padding: 0 calc((100% - 940px) / 2 + 5px);
 }
 
 .nav {