1 files changed, 1 insertions, 0 deletions

diff --git a/include/uapi/linux/if_addr.h b/include/uapi/linux/if_addr.h
index dea10a87dfd1..40fdfea39714 100644
--- a/include/uapi/linux/if_addr.h
+++ b/include/uapi/linux/if_addr.h
@@ -50,6 +50,7 @@ enum {
 #define IFA_F_PERMANENT         0x80
 #define IFA_F_MANAGETEMPADDR    0x100
 #define IFA_F_NOPREFIXROUTE     0x200
+#define IFA_F_MCAUTOJOIN        0x400
 
 struct ifa_cacheinfo {
         __u32   ifa_prefered;