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-rw-r--r--include/sparse/netinet/in.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/sparse/netinet/in.h b/include/sparse/netinet/in.h
index f3ce8b9ca..f66f2056b 100644
--- a/include/sparse/netinet/in.h
+++ b/include/sparse/netinet/in.h
@@ -67,6 +67,7 @@ struct sockaddr_in6 {
#define IPPROTO_ROUTING 43
#define IPPROTO_FRAGMENT 44
#define IPPROTO_GRE 47
+#define IPPROTO_ESP 50
#define IPPROTO_AH 51
#define IPPROTO_ICMPV6 58
#define IPPROTO_NONE 59