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 */