dname: a better comment

diff --git a/src/libknot/dname.h b/src/libknot/dname.h
index cd2492f10db6c095caca001a2dad3fb2c35ea1b9..fa7c006c60bd89fe644db8860b6b0c6d0fd33b9c 100644 (file)
--- a/src/libknot/dname.h
+++ b/src/libknot/dname.h
@@ -101,7 +101,7 @@ knot_dname_t *knot_dname_copy(const knot_dname_t *name, knot_mm_t *mm);
  * \param src     Source name.
  * \param maxlen  Maximum wire length.
  *
- * \return number of bytes written
+ * \return the number of bytes written or negative error code
  */
 int knot_dname_to_wire(uint8_t *dst, const knot_dname_t *src, size_t maxlen);