diff --git a/core/css/header.css b/core/css/header.css
index 972e43aa54d6..5c4893fae474 100644
--- a/core/css/header.css
+++ b/core/css/header.css
@@ -422,4 +422,5 @@
 }
 #header #expand {
 	display: block;
+	height: 32px;
 }