diff --git a/board/netstal/hcu5/Makefile b/board/netstal/hcu5/Makefile
index d037552..5348765 100644
--- a/board/netstal/hcu5/Makefile
+++ b/board/netstal/hcu5/Makefile
@@ -23,7 +23,7 @@
 $(shell mkdir -p $(obj)../common)
 endif
 
-LIB	= $(obj)lib$(BOARD).a
+LIB	= $(obj)lib$(BOARD).o
 
 COBJS	= $(BOARD).o \
 	sdram.o \
@@ -35,7 +35,7 @@
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
 
 $(LIB):	$(OBJS) $(SOBJS)
-	$(AR) $(ARFLAGS) $@ $^
+	$(call cmd_link_o_target, $^)
 
 clean:
 	rm -f $(SOBJS) $(OBJS)