diff --git a/sys/netinet/udp_usrreq.c b/sys/netinet/udp_usrreq.c
index bb11fb0..314c479 100644
--- a/sys/netinet/udp_usrreq.c
+++ b/sys/netinet/udp_usrreq.c
@@ -268,14 +268,12 @@ udp_ctloutput(netmsg_t msg)
 		case IP_MULTICAST_LOOP:
 		case IP_ADD_MEMBERSHIP:
 		case IP_DROP_MEMBERSHIP:
-			if (&curthread->td_msgport != netisr_cpuport(0)) {
 				/*
 				 * This pr_ctloutput msg will be forwarded
 				 * to netisr0 to run; we can't do direct
 				 * detaching anymore.
 				 */
 				inp->inp_flags &= ~INP_DIRECT_DETACH;
-			}
 			break;
 		}
 	}