diff --git a/gtests/net/packetdrill/sctp.h b/gtests/net/packetdrill/sctp.h
index 551e003f7eabd669d7da32f58f0d3c7893b08634..614409d07974129995dcb767d92bd699d2bdd975 100644
--- a/gtests/net/packetdrill/sctp.h
+++ b/gtests/net/packetdrill/sctp.h
@@ -217,7 +217,7 @@ struct sctp_i_data_chunk {
 	__be16 length;
 	__be32 tsn;
 	__be16 sid;
-	__be16 reserved;
+	__be16 res;
 	__be32 mid;
 	union {
 		__be32 ppid;