diff --git a/src/main/java/org/gcube/applicationsupportlayer/social/ApplicationNotificationsManager.java b/src/main/java/org/gcube/applicationsupportlayer/social/ApplicationNotificationsManager.java
index 647fb40..55c9a1a 100644
--- a/src/main/java/org/gcube/applicationsupportlayer/social/ApplicationNotificationsManager.java
+++ b/src/main/java/org/gcube/applicationsupportlayer/social/ApplicationNotificationsManager.java
@@ -838,7 +838,7 @@ public class ApplicationNotificationsManager extends SocialPortalBridge implemen
 	 */
 	@Override
 	public boolean notifyTDMObjectSharing(String userIdToNotify, NotificationType type, String tdmObjectName, String encodedTabularResourceParams) throws Exception {
-		if (type != NotificationType.TDM_RULE_SHARE || type !=  NotificationType.TDM_TEMPLATE_SHARE) 
+		if  (! (type == NotificationType.TDM_RULE_SHARE || type ==  NotificationType.TDM_TEMPLATE_SHARE))
 			throw new IllegalArgumentException("Type must be either TDM_RULE_SHARE or TDM_TEMPLATE_SHARE");
 	
 		String notificationText = "shared the Tabular Data Manager";
diff --git a/src/test/java/org/gcube/applicationsupportlayer/social/AppTest.java b/src/test/java/org/gcube/applicationsupportlayer/social/AppTest.java
index 20dbfc7..6ef4243 100644
--- a/src/test/java/org/gcube/applicationsupportlayer/social/AppTest.java
+++ b/src/test/java/org/gcube/applicationsupportlayer/social/AppTest.java
@@ -6,6 +6,7 @@ import junit.framework.TestSuite;
 
 import org.gcube.application.framework.core.session.ASLSession;
 import org.gcube.application.framework.core.session.SessionManager;
+import org.gcube.portal.databook.shared.NotificationType;
 
 /**
  * Unit test for simple App.
@@ -51,6 +52,6 @@ extends TestCase
 	 * 
 	 */
 	public void testApp() throws Exception { 
-
+		
 	}
 }