diff --git a/docs/Features.md b/docs/Features.md
index 0cda4a5a..23402c1e 100644
--- a/docs/Features.md
+++ b/docs/Features.md
@@ -93,6 +93,7 @@ represent total number of steps per second on the micro-controller.
 | --------------------------- | ----------------- | ----------------- |
 | 16Mhz AVR                   | 151K              | 100K              |
 | 20Mhz AVR                   | 189K              | 125K              |
+| Arduino Zero (ARM SAMD21)   | 234K              | 217K              |
 | STM32F103                   | 340K              | 300K              |
 | Arduino Due (ARM SAM3X8E)   | 382K              | 337K              |
 | Smoothieboard (ARM LPC1768) | 385K              | 385K              |
@@ -100,6 +101,6 @@ represent total number of steps per second on the micro-controller.
 | Beaglebone PRU              | 689K              | 689K              |
 
 On AVR platforms, the highest achievable step rate is with just one
-stepper stepping. On the STM32F103 and Due, the highest step rate is
-with two simultaneous steppers stepping. On the PRU and LPC176x, the
-highest step rate is with three simultaneous steppers.
+stepper stepping. On the STM32F103, Arduino Zero, and Due, the highest
+step rate is with two simultaneous steppers stepping. On the PRU and
+LPC176x, the highest step rate is with three simultaneous steppers.