diff --git a/less/button.less b/less/button.less
index 5085dcce675..247e075399b 100644
--- a/less/button.less
+++ b/less/button.less
@@ -82,6 +82,7 @@ span.buttonSeparator {
     padding-bottom: 5px;
     width: auto;
     height: auto;
+    min-width: calc(@defaultFontSize * 6); // issue #6384
   }
 
   &.primaryButton,