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-rw-r--r--sysdeps/unix/sysv/linux/net/if_arp.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/net/if_arp.h b/sysdeps/unix/sysv/linux/net/if_arp.h
index c4ac8e8400..25d65702cd 100644
--- a/sysdeps/unix/sysv/linux/net/if_arp.h
+++ b/sysdeps/unix/sysv/linux/net/if_arp.h
@@ -92,6 +92,7 @@ struct arphdr
#define ARPHRD_PPP 512
#define ARPHRD_HDLC 513 /* (Cisco) HDLC. */
#define ARPHRD_LAPB 516 /* LAPB. */
+#define ARPHRD_DDCMP 517 /* Digital's DDCMP. */
#define ARPHRD_TUNNEL 768 /* IPIP tunnel. */
#define ARPHRD_TUNNEL6 769 /* IPIP6 tunnel. */