diff --git a/src/soc/intel/alderlake/acpi.c b/src/soc/intel/alderlake/acpi.c
index 1dc14be7..7687f02 100644
--- a/src/soc/intel/alderlake/acpi.c
+++ b/src/soc/intel/alderlake/acpi.c
@@ -166,6 +166,7 @@
 	{ SA_DEVFN_ROOT,	ACPI_DEVICE_SLEEP_D3 },
 	{ SA_DEVFN_CPU_PCIE1_0,	ACPI_DEVICE_SLEEP_D3 },
 	{ SA_DEVFN_IGD,		ACPI_DEVICE_SLEEP_D3 },
+	{ SA_DEVFN_DPTF,	ACPI_DEVICE_SLEEP_D3 },
 	{ SA_DEVFN_IPU,		ACPI_DEVICE_SLEEP_D3 },
 	{ SA_DEVFN_CPU_PCIE6_0,	ACPI_DEVICE_SLEEP_D3 },
 	{ SA_DEVFN_CPU_PCIE6_2,	ACPI_DEVICE_SLEEP_D3 },