diff --git a/skeletons/ber_decoder.h b/skeletons/ber_decoder.h
index 768133b..9fe2e89 100644
--- a/skeletons/ber_decoder.h
+++ b/skeletons/ber_decoder.h
@@ -17,6 +17,7 @@
 /*
  * The BER decoder of any type.
  * This function may be invoked directly from the application.
+ * The der_encode() function (der_encoder.h) is an opposite to ber_decode().
  */
 asn_dec_rval_t ber_decode(struct asn_codec_ctx_s *opt_codec_ctx,
 	struct asn_TYPE_descriptor_s *type_descriptor,
diff --git a/skeletons/der_encoder.h b/skeletons/der_encoder.h
index 4e2fb06..61431c6 100644
--- a/skeletons/der_encoder.h
+++ b/skeletons/der_encoder.h
@@ -15,6 +15,7 @@
 
 /*
  * The DER encoder of any type. May be invoked by the application.
+ * The ber_decode() function (ber_decoder.h) is an opposite of der_encode().
  */
 asn_enc_rval_t der_encode(struct asn_TYPE_descriptor_s *type_descriptor,
 		void *struct_ptr,	/* Structure to be encoded */