diff --git a/src/main/java/org/gcube/portal/social/networking/ws/methods/v2/Notifications.java b/src/main/java/org/gcube/portal/social/networking/ws/methods/v2/Notifications.java
index 9429490..097b070 100644
--- a/src/main/java/org/gcube/portal/social/networking/ws/methods/v2/Notifications.java
+++ b/src/main/java/org/gcube/portal/social/networking/ws/methods/v2/Notifications.java
@@ -156,6 +156,7 @@ public class Notifications {
 		@ResponseCode ( code = 200, condition = "Users with silenced notifications are reported in the 'result' field of the returned object"),
 		@ResponseCode ( code = 500, condition = ErrorMessages.ERROR_IN_API_RESULT)
 	})
+	@QueryParam("username") 
 	@AuthorizationControl(allowedRoles={INFRASTRUCTURE_MANAGER_ROLE}, exception=AuthException.class)
 	public Response isUserDisabled(String usernameToCheck) throws ValidationException{
 		ResponseBean responseBean = new ResponseBean();