diff --git a/core/css/header.scss b/core/css/header.scss
index af98e20a9d..c86e35707f 100644
--- a/core/css/header.scss
+++ b/core/css/header.scss
@@ -273,6 +273,7 @@ nav[role='navigation'] {
 	}
 	a {
 		position: relative;
+		width: 100%;
 		display: inline-flex;
 		padding: 10px 12px;
 		height: 40px;