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-rw-r--r--include/netinet/in.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/netinet/in.h b/include/netinet/in.h
index 2e25afeb..ee6e19fb 100644
--- a/include/netinet/in.h
+++ b/include/netinet/in.h
@@ -217,6 +217,7 @@ uint16_t ntohs(uint16_t);
#define IP_PMTUDISC_WANT 1
#define IP_PMTUDISC_DO 2
#define IP_PMTUDISC_PROBE 3
+#define IP_PMTUDISC_INTERFACE 4
#define IP_DEFAULT_MULTICAST_TTL 1
#define IP_DEFAULT_MULTICAST_LOOP 1