diff --git a/org.adempiere.ui.zk/theme/default/css/theme.css.dsp b/org.adempiere.ui.zk/theme/default/css/theme.css.dsp
index 8ccf51c956..32f5edd072 100644
--- a/org.adempiere.ui.zk/theme/default/css/theme.css.dsp
+++ b/org.adempiere.ui.zk/theme/default/css/theme.css.dsp
@@ -878,6 +878,10 @@ div.simileAjax-bubble-container {
 
 .z-window-highlighted {
 	z-index: 1900 !important;
+}
+
+.z-window-popup {
+	z-index: 1900 !important;
 } 
 
 .grid-layout {