diff --git a/ChangeLog b/ChangeLog
index 53d286a5..3e7587db 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2006-12-15 Joerg Wunsch <j@uriah.heep.sax.de>
+
+	Submitted by ivanv at netman.ru
+	* jtagmkI.c: fix length for single-byte write operations.
+	Closes bug #18527 JTAG ICE: fuse bits have been writen incorrectly
+
 2006-12-11 Joerg Wunsch <j@uriah.heep.sax.de>
 
 	* jtagmkII.c (jtagmkII_paged_write): Remove a debugging
diff --git a/jtagmkI.c b/jtagmkI.c
index ef8ed02b..259ce1bc 100644
--- a/jtagmkI.c
+++ b/jtagmkI.c
@@ -1110,7 +1110,7 @@ static int jtagmkI_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
       return -1;
   }
 
-  cmd[2] = 1;
+  cmd[2] = 1 - 1;
   if (cmd[1] == MTYPE_SPM) {
     /*
      * Flash is word-addressed, but we cannot handle flash anyway