diff --git a/framework/core/less/lib/Modal.less b/framework/core/less/lib/Modal.less
index 1a00db270..8f331f9e2 100644
--- a/framework/core/less/lib/Modal.less
+++ b/framework/core/less/lib/Modal.less
@@ -152,6 +152,7 @@
     &:before {
       content: " ";
       .header-background();
+      position: absolute;
     }
   }
   .Modal {