diff --git a/board/iphase4539/Makefile b/board/iphase4539/Makefile
index 877afde..89d3524 100644
--- a/board/iphase4539/Makefile
+++ b/board/iphase4539/Makefile
@@ -25,7 +25,7 @@
 
 include $(TOPDIR)/config.mk
 
-LIB	= $(obj)lib$(BOARD).a
+LIB	= $(obj)lib$(BOARD).o
 
 COBJS	:= $(BOARD).o flash.o
 
@@ -34,7 +34,7 @@
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
 
 $(LIB):	$(obj).depend $(OBJS)
-	$(AR) $(ARFLAGS) $@ $(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
 
 clean:
 	rm -f $(SOBJS) $(OBJS)