diff --git a/rc_core/src/polariton/svelto_uuid_copy.rs b/rc_core/src/polariton/svelto_uuid_copy.rs
index 65cc5a6..fa52f05 100644
--- a/rc_core/src/polariton/svelto_uuid_copy.rs
+++ b/rc_core/src/polariton/svelto_uuid_copy.rs
@@ -7,7 +7,7 @@ impl OpIdCopy {
 }
 
 impl <C: Clone + Send + Sync + 'static> OperationModifier<C> for OpIdCopy {
-    fn after(&self, req: &mut polariton::operation::OperationRequest<C>, resp: &mut polariton::operation::OperationResponse<C>) {
+    fn after(&self, req: &mut polariton::operation::OperationRequest<C>, resp: &mut polariton::operation::OperationResponse<C>, _flags: &mut u8) {
         if resp.params.get(&Self::SERVICE_MAPPING_KEY).is_none() {
             if let Some(svelto_service_id) = req.params.get(&Self::SERVICE_MAPPING_KEY) {
                 resp.params.insert(Self::SERVICE_MAPPING_KEY, svelto_service_id.to_owned());