1 files changed, 2 insertions, 0 deletions
diff --git a/tun.c b/tun.c
index 59e87dc..f8ebbb5 100644
--- a/tun.c
+++ b/tun.c
@@ -1697,7 +1697,9 @@ open_tun (const char *dev, const char *dev_type, const char *dev_node, bool ipv6
 	  strerror(errno));
       }
 
+#ifdef IFF_MULTICAST /* openbsd 4.x doesn't have this */
       info.flags |= IFF_MULTICAST;
+#endif
 
       if (ioctl (tt->fd, TUNSIFINFO, &info) < 0) {
 	msg (M_WARN | M_ERRNO, "Can't set interface info: %s",