diff --git a/src/s1ap/asn1c/asnGenFiles/DownlinkNASTransport.h b/src/s1ap/asn1c/asnGenFiles/DownlinkNASTransport.h
new file mode 100644
index 0000000..5c37f2c
--- /dev/null
+++ b/src/s1ap/asn1c/asnGenFiles/DownlinkNASTransport.h
@@ -0,0 +1,42 @@
+/*
+ * Generated by asn1c-0.9.29 (http://lionet.info/asn1c)
+ * From ASN.1 module "S1AP-PDU-Contents"
+ * 	found in "./asn1c/S1AP-PDU-Contents.asn"
+ * 	`asn1c -fcompound-names -fno-include-deps -gen-PER -findirect-choice -pdu=S1AP-PDU`
+ */
+
+#ifndef	_DownlinkNASTransport_H_
+#define	_DownlinkNASTransport_H_
+
+
+#include <asn_application.h>
+
+/* Including external dependencies */
+#include "ProtocolIE-Container.h"
+#include <constr_SEQUENCE.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* DownlinkNASTransport */
+typedef struct DownlinkNASTransport {
+	ProtocolIE_Container_129P31_t	 protocolIEs;
+	/*
+	 * This type is extensible,
+	 * possible extensions are below.
+	 */
+	
+	/* Context for parsing across buffer boundaries */
+	asn_struct_ctx_t _asn_ctx;
+} DownlinkNASTransport_t;
+
+/* Implementation */
+extern asn_TYPE_descriptor_t asn_DEF_DownlinkNASTransport;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* _DownlinkNASTransport_H_ */
+#include <asn_internal.h>