diff --git a/gtests/net/packetdrill/run_system_call.c b/gtests/net/packetdrill/run_system_call.c
index 782f9a3f2569e1fbfb939ae5ce42a8d7218318fa..7e687115d6ecef1ceba2774fe577efba054f479d 100644
--- a/gtests/net/packetdrill/run_system_call.c
+++ b/gtests/net/packetdrill/run_system_call.c
@@ -3759,6 +3759,9 @@ static int check_sctp_notification(struct iovec *iov,
 		case EXPR_ELLIPSIS:
 			break;
 		default:
+			asprintf(error, "Bad type for iov_base. Can't check type %s", 
+				expression_type_to_string(script_iov_base->type));
+			return STATUS_ERR;
 			break;
 		}
 		i++;
diff --git a/gtests/net/packetdrill/script.h b/gtests/net/packetdrill/script.h
index effbd57118eae1592ffc4c1ae51cac61037947f0..95ca7231b944ca261927844a5aef633c0b0ffff8 100644
--- a/gtests/net/packetdrill/script.h
+++ b/gtests/net/packetdrill/script.h
@@ -56,6 +56,7 @@ enum expression_t {
 	EXPR_SCTP_PEER_ADDR_PARAMS,	 /* struct for sctp_paddrparams for SCTP_PEER_ADDR_PARAMS */
 	EXPR_SCTP_ASSOCPARAMS,    /* struct sctp_assocparams for SCTP_ASSOCINFO */
 	EXPR_SCTP_EVENT,	  /* struct sctp_event for SCTP_EVENT */
+	EXPR_SCTP_EVENT_SUBSCRIBE,/* struct sctp_event_subscribe for SCTP_EVENTS */
 	EXPR_SCTP_SNDINFO,	  /* struct sctp_sndinfo for SCTP_DEFAULT_SNDINFO */
 	EXPR_SCTP_SETADAPTATION,  /* struct sctp_setadaptation for SCTP_ADATTATION_LAYER */
 	EXPR_SCTP_SNDRCVINFO,     /* struct sctp_sndrcvinfo for syscall sctp_recvmsg */
@@ -95,6 +96,7 @@ struct expression {
 		struct sctp_stream_value_expr *sctp_stream_value;
 		struct sctp_assocparams_expr *sctp_assocparams;
 		struct sctp_event_expr *sctp_event;
+		struct sctp_event_subscribe_expr *sctp_event_subscribe;
 		struct sctp_sndinfo_expr *sctp_sndinfo;
 		struct sctp_setadaptation_expr *sctp_setadaptation;
 		struct sctp_sndrcvinfo_expr *sctp_sndrcvinfo;
@@ -232,6 +234,20 @@ struct sctp_event_expr {
 	struct expression *se_on;
 };
 
+/* Parse tree for sctp_event_subscribe struct in [gs]etsockopt syscall. */
+struct sctp_event_subscribe_expr {
+	struct expression *sctp_data_io_event;
+	struct expression *sctp_association_event;
+	struct expression *sctp_address_event;
+	struct expression *sctp_send_failure_event;
+	struct expression *sctp_peer_error_event;
+	struct expression *sctp_shutdown_event;
+	struct expression *sctp_partial_delivery_event;
+	struct expression *sctp_adaptation_layer_event;
+	struct expression *sctp_authentication_event;
+	struct expression *sctp_sender_dry_event;
+};
+
 /* Parse tree for sctp_sndinfo struct in [gs]etsockopt syscall. */
 struct sctp_sndinfo_expr {
 	struct expression *snd_sid;