diff --git a/lib/Makefile b/lib/Makefile
index 855aa9b0..6cfe4b7d 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -27,7 +27,7 @@ CFLAGS		= -Os -g -Wall -Wextra -I../include -fno-common \
 		  -mcpu=cortex-m3 -mthumb -Wstrict-prototypes
 # ARFLAGS	= rcsv
 ARFLAGS		= rcs
-OBJS		= rcc.o gpio.o usart.o adc.o spi.o
+OBJS		= rcc.o gpio.o usart.o adc.o spi.o flash.o
 
 # Be silent per default, but 'make V=1' will show all compiler calls.
 ifneq ($(V),1)