diff --git a/lib/ns/interfacemgr.c b/lib/ns/interfacemgr.c
index 473a79f0c1..118b7c0367 100644
--- a/lib/ns/interfacemgr.c
+++ b/lib/ns/interfacemgr.c
@@ -262,12 +262,12 @@ route_connected(isc_nmhandle_t *handle, isc_result_t eresult, void *arg) {
 		      "route_connected: %s", isc_result_totext(eresult));
 
 	if (eresult != ISC_R_SUCCESS) {
+		ns_interfacemgr_detach(&mgr);
 		return;
 	}
 
 	INSIST(mgr->route == NULL);
 
-	ns_interfacemgr_attach(mgr, &(ns_interfacemgr_t *){ NULL });
 	isc_nmhandle_attach(handle, &mgr->route);
 	isc_nm_read(handle, route_recv, mgr);
 }
@@ -345,7 +345,14 @@ ns_interfacemgr_create(isc_mem_t *mctx, ns_server_t *sctx,
 	}
 
 	if (scan) {
-		result = isc_nm_routeconnect(nm, route_connected, mgr);
+		ns_interfacemgr_t *imgr = NULL;
+
+		ns_interfacemgr_attach(mgr, &imgr);
+
+		result = isc_nm_routeconnect(nm, route_connected, imgr);
+		if (result == ISC_R_NOTIMPLEMENTED) {
+			ns_interfacemgr_detach(&imgr);
+		}
 		if (result != ISC_R_SUCCESS) {
 			isc_log_write(IFMGR_COMMON_LOGARGS, ISC_LOG_INFO,
 				      "unable to open route socket: %s",