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-rw-r--r--inet/netinet/in.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/inet/netinet/in.h b/inet/netinet/in.h
index f541c5809d..460745ebb3 100644
--- a/inet/netinet/in.h
+++ b/inet/netinet/in.h
@@ -85,6 +85,8 @@ enum
 #define IPPROTO_SCTP		IPPROTO_SCTP
     IPPROTO_UDPLITE = 136, /* UDP-Lite protocol.  */
 #define IPPROTO_UDPLITE		IPPROTO_UDPLITE
+    IPPROTO_MPLS = 137,    /* MPLS in IP.  */
+#define IPPROTO_MPLS		IPPROTO_MPLS
     IPPROTO_RAW = 255,	   /* Raw IP packets.  */
 #define IPPROTO_RAW		IPPROTO_RAW
     IPPROTO_MAX