X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/3903760236c30e3b5ace7a4eefac3a269d68957c..5ba3f43ea354af8ad55bea84372a2bc834d8757c:/bsd/netinet6/esp_output.c

diff --git a/bsd/netinet6/esp_output.c b/bsd/netinet6/esp_output.c
index 3b8b817d4..720846a19 100644
--- a/bsd/netinet6/esp_output.c
+++ b/bsd/netinet6/esp_output.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008-2016 Apple Inc. All rights reserved.
+ * Copyright (c) 2008-2017 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  *
@@ -828,7 +828,7 @@ esp_output(
 		    ip6 = mtod(m, struct ip6_hdr *);
 		    udp->uh_ulen = htons(plen + siz + extendsiz + esphlen);
 		    udp->uh_sum = in6_pseudo(&ip6->ip6_src, &ip6->ip6_dst, htonl(ntohs(udp->uh_ulen) + IPPROTO_UDP));
-		    m->m_pkthdr.csum_flags = CSUM_UDPIPV6;
+		    m->m_pkthdr.csum_flags = (CSUM_UDPIPV6|CSUM_ZERO_INVERT);
 		    m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
 		    break;
 		}