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-rw-r--r--include/linux/in6.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/in6.h b/include/linux/in6.h
index 4e8350ae886..d559fac4a26 100644
--- a/include/linux/in6.h
+++ b/include/linux/in6.h
@@ -179,6 +179,7 @@ struct in6_flowlabel_req
#define IPV6_PMTUDISC_DONT 0
#define IPV6_PMTUDISC_WANT 1
#define IPV6_PMTUDISC_DO 2
+#define IPV6_PMTUDISC_PROBE 3
/* Flowlabel */
#define IPV6_FLOWLABEL_MGR 32