diff --git a/board/atc/Makefile b/board/atc/Makefile
index 4b9cd7b..bbfb28c 100644
--- a/board/atc/Makefile
+++ b/board/atc/Makefile
@@ -23,7 +23,7 @@
 
 include $(TOPDIR)/config.mk
 
-LIB	= $(obj)lib$(BOARD).a
+LIB	= $(obj)lib$(BOARD).o
 
 COBJS	= $(BOARD).o flash.o ti113x.o
 
@@ -32,7 +32,7 @@
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
 
 $(LIB):	$(obj).depend $(OBJS)
-	$(AR) $(ARFLAGS) $@ $(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
 
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