diff --git a/lib/stm32/f4/Makefile b/lib/stm32/f4/Makefile
index 19ea8efd..614a37e4 100644
--- a/lib/stm32/f4/Makefile
+++ b/lib/stm32/f4/Makefile
@@ -32,7 +32,7 @@ ARFLAGS		= rcs
 OBJS		= rcc.o gpio.o usart.o spi.o flash.o \
 		  i2c.o exti.o pwr.o timer.o \
 		  usb.o usb_standard.o usb_control.o usb_fx07_common.o usb_f107.o \
-		  usb_f207.o adc.o
+		  usb_f207.o adc.o dma.o
 
 VPATH += ../../usb:../:../../cm3