diff --git a/avrdude/ChangeLog b/avrdude/ChangeLog
index 695777a7..ec233133 100644
--- a/avrdude/ChangeLog
+++ b/avrdude/ChangeLog
@@ -1,3 +1,8 @@
+2009-11-03  Michal Ludvig  <mludvig@logix.net.nz>
+
+	* arduino.c: Add on to bug #26703 / patch #6866 - clear DTR/RTS
+	  when closing the port.
+
 2009-10-22  David Hoerl <dhoerl@mac.com>
 
 	* usb_libusb.c: disabled usb_reset for Macs (same as FreeBSD)
diff --git a/avrdude/arduino.c b/avrdude/arduino.c
index fd80567c..b60954a6 100644
--- a/avrdude/arduino.c
+++ b/avrdude/arduino.c
@@ -107,6 +107,12 @@ static int arduino_open(PROGRAMMER * pgm, char * port)
   return 0;
 }
 
+static void arduino_close(PROGRAMMER * pgm)
+{
+  serial_set_dtr_rts(&pgm->fd, 0);
+  serial_close(&pgm->fd);
+  pgm->fd.ifd = -1;
+}
 
 void arduino_initpgm(PROGRAMMER * pgm)
 {
@@ -119,4 +125,5 @@ void arduino_initpgm(PROGRAMMER * pgm)
   strcpy(pgm->type, "Arduino");
   pgm->read_sig_bytes = arduino_read_sig_bytes;
   pgm->open = arduino_open;
+  pgm->close = arduino_close;
 }