diff --git a/lib/stm32/f3/Makefile b/lib/stm32/f3/Makefile
index dc60cfe6..0eb56937 100644
--- a/lib/stm32/f3/Makefile
+++ b/lib/stm32/f3/Makefile
@@ -34,7 +34,7 @@ CFLAGS		= -Os -g \
 # ARFLAGS	= rcsv
 ARFLAGS		= rcs
 
-OBJS		= rcc.o gpio.o flash.o
+OBJS		= rcc.o gpio.o flash.o adc.o
 
 OBJS            += gpio_common_all.o gpio_common_f234.o i2c_common_all.o