diff --git a/src/definitions/elements/button.less b/src/definitions/elements/button.less
index 3008ba2d5..00dab7c91 100755
--- a/src/definitions/elements/button.less
+++ b/src/definitions/elements/button.less
@@ -2384,6 +2384,7 @@
 .ui.vertical.buttons .button {
   display: block;
   float: none;
+  width: 100%;
   margin: @verticalGroupOffset;
   box-shadow: @verticalBoxShadow;
 }