1 files changed, 2 insertions, 0 deletions
diff --git a/ip.h b/ip.h
index d0de6c8..fb4119a 100644
--- a/ip.h
+++ b/ip.h
@@ -118,6 +118,8 @@ static inline uint32_t ip6_get_flow_lbl(const struct ipv6hdr *ip6h)
 }
 
 bool ipv6_l4hdr(struct iov_tail *data, uint8_t *proto, size_t *dlen);
+
+#define IPPROTO_STRLEN		(sizeof("<unknown protocol>"))
 const char *ipproto_name(uint8_t proto);
 
 /* IPv6 link-local all-nodes multicast address, ff02::1 */