diff --git a/lib/asn/src/s1ap_codecs.h b/lib/asn/src/s1ap_codecs.h
new file mode 100644
index 000000000..f0e402af3
--- /dev/null
+++ b/lib/asn/src/s1ap_codecs.h
@@ -0,0 +1,23 @@
+#ifndef _S1AP_CODECS_H__
+#define _S1AP_CODECS_H__
+
+#include "core.h"
+
+#include "s1ap_ies_defs.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+CORE_DECLARE(int) s1ap_decode_pdu(s1ap_message *message, 
+        uint8_t *buffer, uint32_t len);
+
+CORE_DECLARE(int) s1ap_encode_pdu(s1ap_message *message, 
+        uint8_t **buffer, uint32_t *len);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif
+