diff --git a/urjtag/ChangeLog b/urjtag/ChangeLog
index 6345cefa..fb1cffbd 100644
--- a/urjtag/ChangeLog
+++ b/urjtag/ChangeLog
@@ -10,6 +10,8 @@
     actually worked but only returned zero's as this is confusing -- be clear
     in that we didn't even attempt to read the idcode
 
+  * src/cmd/cmd_idcode.c: update usage to reflect reality
+
 2009-05-19  Arnim Laeuger  <arniml>
 
   * data/Makefile.am, data/broadcom/bcm6348/bcm6348,
diff --git a/urjtag/src/cmd/cmd_idcode.c b/urjtag/src/cmd/cmd_idcode.c
index 54b37e00..e4bd2e68 100644
--- a/urjtag/src/cmd/cmd_idcode.c
+++ b/urjtag/src/cmd/cmd_idcode.c
@@ -61,9 +61,10 @@ cmd_idcode_help (void)
 {
     urj_log (URJ_LOG_LEVEL_NORMAL,
              _("Usage: %s [BYTES]\n"
-               "Read [BYTES]|all IDCODEs of all parts in a JTAG chain.\n"
+               "Read [BYTES] IDCODEs of all parts in a JTAG chain.\n"
                "\n"
-               "BYTES must be an unsigned integer, Use 0 for BYTES to read all bytes\n"),
+               "BYTES must be an unsigned integer, and the default is 0.\n"
+               "If BYTES is 0, IDCODEs will be read until 32 consecutive zeros are found.\n"),
              "idcode");
 }