diff --git a/src/s1ap/asn1c/asnGenFiles/Presence.h b/src/s1ap/asn1c/asnGenFiles/Presence.h
new file mode 100644
index 0000000..15becd5
--- /dev/null
+++ b/src/s1ap/asn1c/asnGenFiles/Presence.h
@@ -0,0 +1,54 @@
+/*
+ * Generated by asn1c-0.9.29 (http://lionet.info/asn1c)
+ * From ASN.1 module "S1AP-CommonDataTypes"
+ * 	found in "./asn1c/S1AP-CommonDataTypes.asn"
+ * 	`asn1c -fcompound-names -fno-include-deps -gen-PER -findirect-choice -pdu=S1AP-PDU`
+ */
+
+#ifndef	_Presence_H_
+#define	_Presence_H_
+
+
+#include <asn_application.h>
+
+/* Including external dependencies */
+#include <NativeEnumerated.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Dependencies */
+typedef enum Presence {
+	Presence_optional	= 0,
+	Presence_conditional	= 1,
+	Presence_mandatory	= 2
+} e_Presence;
+
+/* Presence */
+typedef long	 Presence_t;
+
+/* Implementation */
+extern asn_per_constraints_t asn_PER_type_Presence_constr_1;
+extern asn_TYPE_descriptor_t asn_DEF_Presence;
+extern const asn_INTEGER_specifics_t asn_SPC_Presence_specs_1;
+asn_struct_free_f Presence_free;
+asn_struct_print_f Presence_print;
+asn_constr_check_f Presence_constraint;
+ber_type_decoder_f Presence_decode_ber;
+der_type_encoder_f Presence_encode_der;
+xer_type_decoder_f Presence_decode_xer;
+xer_type_encoder_f Presence_encode_xer;
+oer_type_decoder_f Presence_decode_oer;
+oer_type_encoder_f Presence_encode_oer;
+per_type_decoder_f Presence_decode_uper;
+per_type_encoder_f Presence_encode_uper;
+per_type_decoder_f Presence_decode_aper;
+per_type_encoder_f Presence_encode_aper;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* _Presence_H_ */
+#include <asn_internal.h>