diff --git a/doc/advanced-install.md b/doc/advanced-install.md
index ae494ac..0fee0a3 100644
--- a/doc/advanced-install.md
+++ b/doc/advanced-install.md
@@ -11,7 +11,7 @@ Then compile and upload the sketch.
 
 ## Works with no source code changes
 
-* Seeeduino Xiao M0
+* Seeeduino Xiao SAMD21
 * Adafruit Qt Py SAMD21
 
 ## Known to work with source code changes
diff --git a/doc/easy-install.md b/doc/easy-install.md
index 45d5269..213a9d1 100644
--- a/doc/easy-install.md
+++ b/doc/easy-install.md
@@ -1,10 +1,10 @@
 # Easy Installation
 
-1. Get a Seeeduino XIAO M0
-2. Download the most recent xiao m0 firmware from
+1. Get a Seeeduino XIAO SAMD21
+2. Download the most recent XIAO SAMD21 firmware from
 [releases](https://github.com/nealey/vail-adapter/releases)
 3. [Enter bootloader mode](https://wiki.seeedstudio.com/Seeeduino-XIAO/#enter-bootloader-mode)
-4. Copy the firmware onto the XIAO M0
+4. Copy the firmware onto the XIAO SAMD21
 
 [Wideo walkthrough of firmware upload](https://www.youtube.com/watch?v=IgOdkUe5SMY) (3:07)