diff --git a/Arch-activate.md b/Arch-activate.md
index ce731fc..c3e1fb0 100644
--- a/Arch-activate.md
+++ b/Arch-activate.md
@@ -9,6 +9,7 @@ In order to facilitate this loose coupling, Essentials devices go through five p
 #### Classes Referenced
 
 * `PepperDash.Core.Device`
+* `PepperDash.Essentials.Core.EssentialsDevice`
 * `PepperDash.Essentials.Core.DeviceManager`
 * `PepperDash.Essentials.Core.Privacy.MicrophonePrivacyController`