diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig
index bcfa1444ecb8..ea66cbf15da5 100644
--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -316,6 +316,7 @@ config LPC18XX_DAC
 config LTC1660
 	tristate "Linear Technology LTC1660/LTC1665 DAC SPI driver"
 	depends on SPI
+	select REGMAP_SPI
 	help
 	  Say yes here to build support for Linear Technology
 	  LTC1660 and LTC1665 Digital to Analog Converters.