diff --git a/framework/core/less/forum/NotificationGrid.less b/framework/core/less/forum/NotificationGrid.less
index 59a484450..4691be78c 100644
--- a/framework/core/less/forum/NotificationGrid.less
+++ b/framework/core/less/forum/NotificationGrid.less
@@ -1,6 +1,8 @@
 .NotificationGrid {
   background: @control-bg;
   border-radius: @border-radius;
+  border-collapse: collapse;
+  border-spacing: 0;
 
   td, th {
     border-bottom: 1px solid @body-bg;