diff --git a/themes/base/core.css b/themes/base/core.css
index a6c1bb738..5ea272e9f 100644
--- a/themes/base/core.css
+++ b/themes/base/core.css
@@ -15,6 +15,7 @@
 	display: none;
 }
 .ui-helper-hidden-accessible {
+	position: absolute;
 	pointer-events: none;
         opacity: 0;
 	white-space: nowrap;