diff --git a/src/mainboard/siemens/mc_apl1/variants/mc_apl2/devicetree.cb b/src/mainboard/siemens/mc_apl1/variants/mc_apl2/devicetree.cb
index c362e6c..7a0b886 100644
--- a/src/mainboard/siemens/mc_apl1/variants/mc_apl2/devicetree.cb
+++ b/src/mainboard/siemens/mc_apl1/variants/mc_apl2/devicetree.cb
@@ -47,6 +47,9 @@
 	# 0:HS400(Default), 1:HS200, 2:DDR50
 	register "emmc_host_max_speed" = "2"
 
+	# Enable Vtd feature
+	register "enable_vtd" = "1"
+
 	device domain 0 on
 		device pci 00.0 on  end	# - Host Bridge
 		device pci 00.1 off end	# - DPTF
diff --git a/src/mainboard/siemens/mc_apl1/variants/mc_apl5/devicetree.cb b/src/mainboard/siemens/mc_apl1/variants/mc_apl5/devicetree.cb
index dfdfd55..989ab45 100644
--- a/src/mainboard/siemens/mc_apl1/variants/mc_apl5/devicetree.cb
+++ b/src/mainboard/siemens/mc_apl1/variants/mc_apl5/devicetree.cb
@@ -46,6 +46,9 @@
 	# 0:HS400(Default), 1:HS200, 2:DDR50
 	register "emmc_host_max_speed" = "2"
 
+	# Enable Vtd feature
+	register "enable_vtd" = "1"
+
 	# Intel Common SoC Config
 	#+-------------------+---------------------------+
 	#| Field             |  Value                    |