diff --git a/gtests/net/packetdrill/parser.y b/gtests/net/packetdrill/parser.y
index 51843f8d1efe7a8c3367c671f90a7fb9f44d6b75..1821ff1dc8e23164e9f4e0ef9c15dee3424d0093 100644
--- a/gtests/net/packetdrill/parser.y
+++ b/gtests/net/packetdrill/parser.y
@@ -1141,6 +1141,9 @@ chunk_type
 | FORWARD_TSN {
 	$$ = SCTP_FORWARD_TSN_CHUNK_TYPE;
 }
+| I_FORWARD_TSN {
+	$$ = SCTP_I_FORWARD_TSN_CHUNK_TYPE;
+}
 ;
 
 opt_chunk_type