diff --git a/gtests/net/packetdrill/tests/bsd/sctp/sctp_active.pkt b/gtests/net/packetdrill/tests/bsd/sctp/sctp_active.pkt
index 1cc9a61807ec65858904874ebf3e45036b4b5852..3d3eb5881e5df739d39914802b47f758f1d34eba 100644
--- a/gtests/net/packetdrill/tests/bsd/sctp/sctp_active.pkt
+++ b/gtests/net/packetdrill/tests/bsd/sctp/sctp_active.pkt
@@ -11,7 +11,7 @@
 // Send some data.
 +1.0 write(3, ..., 1000) = 1000
 +0.0 > sctp: DATA[tsn=0 sid=0 ssn=0 ppid=0]
-+0.1 < sctp: SACK[tsn=0 a_rwnd=1500]
++0.1 < sctp: SACK[tsn=0 a_rwnd=1500 gaps=[] dups=[]]
 // Receive some data
 +1.0 < sctp: DATA[tsn=3 sid=0 ssn=0 ppid=0] // How to handle
 +0.0 read(3, ..., 2000) = 1000
diff --git a/gtests/net/packetdrill/tests/bsd/sctp/sctp_passive.pkt b/gtests/net/packetdrill/tests/bsd/sctp/sctp_passive.pkt
index 7e4e14cba2dbfe81472b6124bcd2f3b9ee597b07..716c4c4e7be1f0da1536535c1d5e44301b3a3e32 100644
--- a/gtests/net/packetdrill/tests/bsd/sctp/sctp_passive.pkt
+++ b/gtests/net/packetdrill/tests/bsd/sctp/sctp_passive.pkt
@@ -11,7 +11,7 @@
 // Send some data.
 +1.0 write(4, ..., 1000) = 1000
 +0.0 > sctp: DATA[tsn=10 sid=0 ssn=0 ppid=0]
-+0.1 < sctp: SACK[tsn=10 a_rwnd=1500]
++0.1 < sctp: SACK[tsn=10 a_rwnd=1500 gaps=[] dups=[]]
 // Receive some data
 +1.0 < sctp: DATA[tsn=1 sid=0 ssn=1 ppid=0] // How to handle payload?
 +0.0 read(4, ..., 2000) = 1000