diff --git a/kdc/connect.c b/kdc/connect.c
index 3383d6f13..b8c19af50 100644
--- a/kdc/connect.c
+++ b/kdc/connect.c
@@ -129,11 +129,13 @@ add_standard_ports (int family)
     add_port_service(family, "kerberos", 88, "tcp");
     add_port_service(family, "kerberos-sec", 88, "udp");
     add_port_service(family, "kerberos-sec", 88, "tcp");
-    add_port_service(family, "kerberos-iv", 750, "udp");
-    add_port_service(family, "kerberos-iv", 750, "tcp");
     if(enable_http)
 	add_port_service(family, "http", 80, "tcp");
 #ifdef KRB4
+    if(enable_v4) {
+	add_port_service(family, "kerberos-iv", 750, "udp");
+	add_port_service(family, "kerberos-iv", 750, "tcp");
+    }
     if(enable_524) {
 	add_port_service(family, "krb524", 4444, "udp");
 	add_port_service(family, "krb524", 4444, "tcp");