diff --git a/src/main/java/org/gcube/portlets/user/workspace/client/view/sharing/UserStore.java b/src/main/java/org/gcube/portlets/user/workspace/client/view/sharing/UserStore.java
index c426c18..eec1ec6 100644
--- a/src/main/java/org/gcube/portlets/user/workspace/client/view/sharing/UserStore.java
+++ b/src/main/java/org/gcube/portlets/user/workspace/client/view/sharing/UserStore.java
@@ -35,7 +35,7 @@ public class UserStore implements ContactFetcher{
 	@Override
 	public void getListContact(AsyncCallback<List<InfoContactModel>> callback, boolean reloadList){
 
-		if(reloadList || listAllContact==null)
+		if(reloadList || listAllContact==null || listAllContact.size()==0)
 			loadAllUsersFromServer(callback);
 		else
 			callback.onSuccess(listAllContact);