diff --git a/theme/default/style.css b/theme/default/style.css
index 5e5283188a..7d2f605b30 100644
--- a/theme/default/style.css
+++ b/theme/default/style.css
@@ -1,4 +1,5 @@
 div.olMap {
+	z-index: 0;
     padding: 0px!important;
     margin: 0px!important;
 }