diff --git a/docs/layer-contents.md b/docs/layer-contents.md
index 29cfa35..e2c59a4 100644
--- a/docs/layer-contents.md
+++ b/docs/layer-contents.md
@@ -11,6 +11,8 @@
 * raspberrypi-cm (dummy alias for raspberrypi)
 * raspberrypi-cm3 (dummy alias for raspberrypi2)
 
+Note: The raspberrypi3 machines include support for Raspberry Pi 3B+.
+
 ## Images
 
 * rpi-hwup-image