diff --git a/res/css/structures/_AutoHideScrollbar.scss b/res/css/structures/_AutoHideScrollbar.scss
index cb0d6f7f09..0e1faf727d 100644
--- a/res/css/structures/_AutoHideScrollbar.scss
+++ b/res/css/structures/_AutoHideScrollbar.scss
@@ -74,6 +74,7 @@ body.mx_scrollbar_nooverlay {
 // or fallback for webkit browsers
 ::-webkit-scrollbar {
     width: 6px;
+    height: 6px;
     background-color: $scrollbar-track-color;
 }