diff --git a/static/tabs.css b/static/tabs.css
index 78bfa55db..f0c170d7e 100644
--- a/static/tabs.css
+++ b/static/tabs.css
@@ -83,10 +83,10 @@
 
 }
 
-.tab.is-drop-target:before {
+.tab.is-drop-target:after {
   position: absolute;
   top: 0;
-  left: -2px;
+  right: -2px;
   content: "";
   z-index: 999;
   display: inline-block;