diff --git a/zkwebui/WEB-INF/src/org/adempiere/webui/component/GridPanel.java b/zkwebui/WEB-INF/src/org/adempiere/webui/component/GridPanel.java
index 9985c2f6c6..576a014482 100644
--- a/zkwebui/WEB-INF/src/org/adempiere/webui/component/GridPanel.java
+++ b/zkwebui/WEB-INF/src/org/adempiere/webui/component/GridPanel.java
@@ -228,8 +228,9 @@ public class GridPanel extends Borderlayout implements EventListener
 	
 	public void deactivate() {
 		ListitemRenderer lr = null;
+		listModel = null;
 		listbox.setItemRenderer(lr);
-		listbox.setModel(null);
+		listbox.setModel(listModel);
 	}
 
 	public void onEvent(Event event) throws Exception