diff --git a/src/main/java/org/gcube/portlets/user/td/columnwidget/client/custom/IconButton.java b/src/main/java/org/gcube/portlets/user/td/columnwidget/client/custom/IconButton.java
index 04e14a8..caba9b7 100644
--- a/src/main/java/org/gcube/portlets/user/td/columnwidget/client/custom/IconButton.java
+++ b/src/main/java/org/gcube/portlets/user/td/columnwidget/client/custom/IconButton.java
@@ -2,6 +2,7 @@ package org.gcube.portlets.user.td.columnwidget.client.custom;
 
 
 import com.google.gwt.core.client.GWT;
+import com.google.gwt.dom.client.Element;
 import com.google.gwt.event.dom.client.ClickEvent;
 import com.google.gwt.event.dom.client.ClickHandler;
 import com.google.gwt.event.dom.client.HasClickHandlers;
@@ -10,6 +11,7 @@ import com.google.gwt.resources.client.ImageResource;
 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
 import com.google.gwt.user.client.Event;
 import com.sencha.gxt.core.client.dom.XDOM;
+import com.sencha.gxt.core.client.dom.XElement;
 import com.sencha.gxt.widget.core.client.Component;
 
 /**
@@ -31,8 +33,10 @@ public class IconButton extends Component implements HasClickHandlers {
 
 		SafeHtmlBuilder sb = new SafeHtmlBuilder();
 		this.appearance.render(sb);
-
-		setElement(XDOM.create(sb.toSafeHtml()));
+		
+		XElement element=XDOM.create(sb.toSafeHtml());
+		setElement((Element)element);
+		
 		sinkEvents(Event.ONCLICK);
 	}