diff --git a/src/main/java/org/gcube/portlets/widgets/wsexplorer/client/view/Breadcrumbs.java b/src/main/java/org/gcube/portlets/widgets/wsexplorer/client/view/Breadcrumbs.java
index 8e80b56..7c03df5 100644
--- a/src/main/java/org/gcube/portlets/widgets/wsexplorer/client/view/Breadcrumbs.java
+++ b/src/main/java/org/gcube/portlets/widgets/wsexplorer/client/view/Breadcrumbs.java
@@ -102,6 +102,9 @@ public class Breadcrumbs extends Composite {
 	 * @param parent the parent
 	 */
 	private void addNavigationLink(Item parent) {
+		if(parent==null)
+			return;
+		
 		final NavLink navLink = new NavLink(parent.getName());
 		navLink.setName(parent.getId());
 		breadcrumbs.add(navLink);