diff --git a/src/s1ap/asn1c/asnGenFiles/asn_ioc.h b/src/s1ap/asn1c/asnGenFiles/asn_ioc.h
new file mode 100644
index 0000000..7de210e
--- /dev/null
+++ b/src/s1ap/asn1c/asnGenFiles/asn_ioc.h
@@ -0,0 +1,51 @@
+/*
+ * Run-time support for Information Object Classes.
+ * Copyright (c) 2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#ifndef	ASN_IOC_H
+#define	ASN_IOC_H
+
+#include <asn_system.h>		/* Platform-specific types */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct asn_TYPE_descriptor_s;
+struct asn_ioc_cell_s;
+
+/*
+ * X.681, #13
+ */
+typedef struct asn_ioc_set_s {
+    size_t rows_count;
+    size_t columns_count;
+    const struct asn_ioc_cell_s *rows;
+} asn_ioc_set_t;
+
+
+typedef struct asn_ioc_cell_s {
+    const char *field_name; /* Is equal to corresponding column_name */
+    enum {
+        aioc__undefined = 0,
+        aioc__value,
+        aioc__type,
+        aioc__open_type,
+    } cell_kind;
+    struct asn_TYPE_descriptor_s *type_descriptor;
+    const void *value_sptr;
+    struct {
+        size_t types_count;
+        struct {
+            unsigned choice_position;
+        } *types;
+    } open_type;
+} asn_ioc_cell_t;
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* ASN_IOC_H */