diff --git a/arch/arm/configs/bcm2709_defconfig b/arch/arm/configs/bcm2709_defconfig
index a89b2f474369a3..3ec82e75d87b45 100644
--- a/arch/arm/configs/bcm2709_defconfig
+++ b/arch/arm/configs/bcm2709_defconfig
@@ -1111,6 +1111,7 @@ CONFIG_IIO_BUFFER=y
 CONFIG_IIO_BUFFER_CB=m
 CONFIG_IIO_KFIFO_BUF=m
 CONFIG_MCP320X=m
+CONFIG_MCP3422=m
 CONFIG_DHT11=m
 CONFIG_PWM_BCM2835=m
 CONFIG_RASPBERRYPI_FIRMWARE=y
diff --git a/arch/arm/configs/bcmrpi_defconfig b/arch/arm/configs/bcmrpi_defconfig
index eed2e94f4686f7..91edf91d34eeb9 100644
--- a/arch/arm/configs/bcmrpi_defconfig
+++ b/arch/arm/configs/bcmrpi_defconfig
@@ -1118,6 +1118,7 @@ CONFIG_IIO_BUFFER=y
 CONFIG_IIO_BUFFER_CB=m
 CONFIG_IIO_KFIFO_BUF=m
 CONFIG_MCP320X=m
+CONFIG_MCP3422=m
 CONFIG_DHT11=m
 CONFIG_PWM_BCM2835=m
 CONFIG_RASPBERRYPI_FIRMWARE=y