diff --git a/board/cerf250/Makefile b/board/cerf250/Makefile
index b111b51..d824ffa 100644
--- a/board/cerf250/Makefile
+++ b/board/cerf250/Makefile
@@ -23,7 +23,7 @@
 
 include $(TOPDIR)/config.mk
 
-LIB	= $(obj)lib$(BOARD).a
+LIB	= $(obj)lib$(BOARD).o
 
 COBJS	:= cerf250.o flash.o
 
@@ -31,7 +31,7 @@
 OBJS	:= $(addprefix $(obj),$(COBJS))
 
 $(LIB):	$(obj).depend $(OBJS)
-	$(AR) $(ARFLAGS) $@ $(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
 
 clean:
 	rm -f $(OBJS)