diff --git a/less/input-groups.less b/less/input-groups.less
index a8712f25b9..cd3e798337 100644
--- a/less/input-groups.less
+++ b/less/input-groups.less
@@ -161,6 +161,7 @@
     > .btn,
     > .btn-group {
       margin-left: -1px;
+      z-index: 2;
     }
   }
 }