diff --git a/src/sctp.c b/src/sctp.c
index 1a8a472..2b78c4f 100644
--- a/src/sctp.c
+++ b/src/sctp.c
@@ -140,7 +140,7 @@ int sctp_outgoing_data(Sctp *sctp, char *buf, size_t len, SctpDataPpid ppid, uin
 
   chunk->type = SCTP_DATA;
   chunk->iube = 0x06;
-  chunk->si = htons(0);
+  chunk->sid = htons(0);
   chunk->sqn = htons(sqn++);
   chunk->ppid = htonl(ppid);