diff --git a/client/galaxy/style/less/ui/icon-btn.less b/client/galaxy/style/less/ui/icon-btn.less
index a880656b1a6..25b67a37643 100644
--- a/client/galaxy/style/less/ui/icon-btn.less
+++ b/client/galaxy/style/less/ui/icon-btn.less
@@ -40,7 +40,7 @@
 
 .icon-btn-group {
     display: inline-block;
-    .icon-btn:not(:last-child) {
+    .icon-btn:not(:last-of-type) {
         margin: 0px;
         border-radius: 0px;
         border-right: none;