diff --git a/src/mainboard/siemens/mc_bdx1/Kconfig b/src/mainboard/siemens/mc_bdx1/Kconfig
index dc2093d58a..a24d09dc19 100644
--- a/src/mainboard/siemens/mc_bdx1/Kconfig
+++ b/src/mainboard/siemens/mc_bdx1/Kconfig
@@ -13,6 +13,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select DRIVER_INTEL_I210
 	select DRIVER_SIEMENS_NC_FPGA
 	select DRIVERS_I2C_RX6110SA
+	select DRIVERS_I2C_PCA9538
 
 config MAINBOARD_DIR
 	string
diff --git a/src/mainboard/siemens/mc_bdx1/devicetree.cb b/src/mainboard/siemens/mc_bdx1/devicetree.cb
index 8bb582e383..6b5c118fd8 100644
--- a/src/mainboard/siemens/mc_bdx1/devicetree.cb
+++ b/src/mainboard/siemens/mc_bdx1/devicetree.cb
@@ -23,6 +23,13 @@ chip soc/intel/fsp_broadwell_de
 				register "user_weekday" = "4"
 				device i2c 0x32 on end	# RTC RX6110 SA
 			end
+			#Enable I/O expander
+			chip drivers/i2c/pca9538
+				register "in_out" = "0xff"
+				register "invert" = "0x00"
+				register "out_val" = "0x00"
+				device i2c 0x71 on end # I/O expander
+			end
 		end # SMBus Controller
 		device pci 1f.5 on end # SATA Controller
 	end