diff --git a/core/modules/toolbar/css/toolbar.theme.css b/core/modules/toolbar/css/toolbar.theme.css
index 981ee00..a16630f 100644
--- a/core/modules/toolbar/css/toolbar.theme.css
+++ b/core/modules/toolbar/css/toolbar.theme.css
@@ -156,6 +156,13 @@
   border-left: 0 none;
   border-right: 1px solid #c9c9c9;
 }
+.toolbar .toolbar-tray-horizontal .toolbar-toggle-orientation > .toolbar-lining {
+  position: relative;
+  top: 50%;
+  -ms-transform: translateY(-50%);
+  -webkit-transform: translateY(-50%);
+  transform: translateY(-50%);
+}
 .toolbar .toolbar-toggle-orientation > .toolbar-lining {
   float: right; /* LTR */
 }