diff --git a/variants/arduino_zero/openocd_scripts/arduino_zero.cfg b/variants/arduino_zero/openocd_scripts/arduino_zero.cfg
index af45443b7d24527132d77ff790d386ddb2929111..e8dbad86e8cb9f582a6674e6e3d31c6fe578d04a 100644
--- a/variants/arduino_zero/openocd_scripts/arduino_zero.cfg
+++ b/variants/arduino_zero/openocd_scripts/arduino_zero.cfg
@@ -25,6 +25,6 @@ set CHIPNAME at91samd21g18
 set ENDIAN little
 
 # choose a port here
-set telnet_port 9876
+set telnet_port 0
 
 source [find target/at91samdXX.cfg]