diff --git a/src/mainboard/google/myst/variants/baseboard/devicetree.cb b/src/mainboard/google/myst/variants/baseboard/devicetree.cb
index 085e464e8f..669d6ecd53 100644
--- a/src/mainboard/google/myst/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/myst/variants/baseboard/devicetree.cb
@@ -131,6 +131,7 @@ chip soc/amd/phoenix
 					end
 				end
 			end
+			device ref acp on end # Audio Processor (ACP)
 		end
 		device ref gpp_bridge_c on  # Internal GPP Bridge 2 to Bus C
 			device ref usb4_xhci_0 on