diff --git a/src/definitions/elements/header.less b/src/definitions/elements/header.less
index 4fdb8724fc..2259a7fe7e 100755
--- a/src/definitions/elements/header.less
+++ b/src/definitions/elements/header.less
@@ -48,6 +48,7 @@
 ---------------*/
 
 .ui.header .sub.header {
+  display: block;
   font-weight: normal;
   padding: 0em;
   margin: @subHeaderMargin;