--- a/src/policies/DIF/RMT/MaxQueue/ECNMarker/ECNMarker.ned
+++ b/src/policies/DIF/RMT/MaxQueue/ECNMarker/ECNMarker.ned
@@ -23,4 +23,5 @@
 {
     parameters:
         @display("i=block/socket");
+        @signal[RMT-SlowDownRequest];
 }