X-Git-Url: https://git.distorted.org.uk/~mdw/secnet/blobdiff_plain/2368720d4c08f50a41abb784c709e3e60a71984c..fe21ce5540e6ca02755f18493672dbaab4ec30f7:/netlink.c

diff --git a/netlink.c b/netlink.c
index 50a920f..ea1221d 100644
--- a/netlink.c
+++ b/netlink.c
@@ -180,7 +180,7 @@ static inline uint16_t ip_fast_csum(const uint8_t *iph, int32_t ihl) {
     return sum;
 }
 #else
-static inline uint16_t ip_fast_csum(uint8_t *iph, int32_t ihl)
+static inline uint16_t ip_fast_csum(const uint8_t *iph, int32_t ihl)
 {
     assert(ihl < INT_MAX/4);
     return ip_csum(iph,ihl*4);