diff --git a/drivers/adc/Makefile b/drivers/adc/Makefile
index eb85b8b..cebf26d 100644
--- a/drivers/adc/Makefile
+++ b/drivers/adc/Makefile
@@ -7,3 +7,4 @@
 
 obj-$(CONFIG_ADC) += adc-uclass.o
 obj-$(CONFIG_ADC_EXYNOS) += exynos-adc.o
+obj-$(CONFIG_ADC_SANDBOX) += sandbox.o