diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index 7593ccda9b..359c5c3b73 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -17,6 +17,10 @@
    past entries belonging to author(s): Viktor Szakats.
 */
 
+2009-09-02 17:10 UTC+0200 Przemyslaw Czerpak (druzus/at/priv.onet.pl)
+  * harbour/contrib/hbnetio/netio.h
+    * added small description
+
 2009-09-02 17:04 UTC+0200 Przemyslaw Czerpak (druzus/at/priv.onet.pl)
   * harbour/contrib/hbnetio/netiocli.c
     ! fixed typo - thanks to Mindaugas
diff --git a/harbour/contrib/hbnetio/netio.h b/harbour/contrib/hbnetio/netio.h
index c58dd3a724..85ea8af0bb 100644
--- a/harbour/contrib/hbnetio/netio.h
+++ b/harbour/contrib/hbnetio/netio.h
@@ -102,6 +102,7 @@
 /* { NETIO_SIZE,   file_no[2], ... } -> { NETIO_SIZE, size[ 8 ], err[ 2 ], ... } */
 /* { NETIO_COMMIT, file_no[2], ... } -> NULL */
 /* { NETIO_CLOSE,  file_no[2], ... } -> { NETIO_CLOSE, ... } */
+/* alternative answer for all non NULL messages: -> { NETIO_ERROR,  err[ 2 ], ... } */
 
 /* netio errors */
 #define NETIO_ERR_UNKNOWN_COMMAND   0xff01