diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig
index 979070196da9..54c08ca1beb0 100644
--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -124,6 +124,7 @@ config AD5624R_SPI
 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.