diff --git a/lib/lwip/src/netif/ppp/vjbsdhdr.h b/lib/lwip/src/netif/ppp/vjbsdhdr.h
new file mode 100644
index 0000000..a089352
--- /dev/null
+++ b/lib/lwip/src/netif/ppp/vjbsdhdr.h
@@ -0,0 +1,76 @@
+#ifndef VJBSDHDR_H
+#define VJBSDHDR_H
+
+#include "lwip/tcp.h"
+
+
+/*
+ * Structure of an internet header, naked of options.
+ *
+ * We declare ip_len and ip_off to be short, rather than u_short
+ * pragmatically since otherwise unsigned comparisons can result
+ * against negative integers quite easily, and fail in subtle ways.
+ */
+PACK_STRUCT_BEGIN
+struct ip
+{
+#if defined(NO_CHAR_BITFIELDS)
+	u_char ip_hl_v;	/* bug in GCC for mips means the bitfield stuff will sometimes break - so we use a char for both and get round it with macro's instead... */
+#else
+#if BYTE_ORDER == LITTLE_ENDIAN
+	unsigned ip_hl:4,				/* header length */
+		ip_v:4;						/* version */
+#elif BYTE_ORDER == BIG_ENDIAN 
+	unsigned ip_v:4,					/* version */
+		ip_hl:4;					/* header length */
+#else
+	COMPLAIN - NO BYTE ORDER SELECTED!
+#endif
+#endif
+	u_char	ip_tos;					/* type of service */
+	u_short	ip_len;					/* total length */
+	u_short	ip_id;					/* identification */
+	u_short	ip_off;					/* fragment offset field */
+#define	IP_DF 0x4000				/* dont fragment flag */
+#define	IP_MF 0x2000				/* more fragments flag */
+#define	IP_OFFMASK 0x1fff			/* mask for fragmenting bits */
+	u_char	ip_ttl;					/* time to live */
+	u_char	ip_p;					/* protocol */
+	u_short	ip_sum;					/* checksum */
+	struct	in_addr ip_src,ip_dst;	/* source and dest address */
+};
+PACK_STRUCT_END
+
+typedef u32_t tcp_seq;
+
+/*
+ * TCP header.
+ * Per RFC 793, September, 1981.
+ */
+PACK_STRUCT_BEGIN
+struct tcphdr  
+{
+	u_short	th_sport;		/* source port */
+	u_short	th_dport;		/* destination port */
+	tcp_seq	th_seq;			/* sequence number */
+	tcp_seq	th_ack;			/* acknowledgement number */
+#if defined(NO_CHAR_BITFIELDS)
+	u_char th_x2_off;
+#else
+#if BYTE_ORDER == LITTLE_ENDIAN
+	unsigned	th_x2:4,		/* (unused) */
+			th_off:4;		/* data offset */
+#endif
+#if BYTE_ORDER == BIG_ENDIAN 
+	unsigned	th_off:4,		/* data offset */
+			th_x2:4;		/* (unused) */
+#endif
+#endif
+	u_char	th_flags;
+	u_short	th_win;			/* window */
+	u_short	th_sum;			/* checksum */
+	u_short	th_urp;			/* urgent pointer */
+};
+PACK_STRUCT_END
+
+#endif /* VJBSDHDR_H */