diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 5da6a4d..c2c87e8 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -12,6 +12,7 @@
 
 # SPI master controller drivers (bus)
 obj-$(CONFIG_SPI_BITBANG)		+= spi_bitbang.o
+obj-$(CONFIG_SPI_BUTTERFLY)		+= spi_butterfly.o
 # 	... add above this line ...
 
 # SPI protocol drivers (device/link on bus)