diff --git a/arch/avr32/cpu/at32ap700x/Makefile b/arch/avr32/cpu/at32ap700x/Makefile
index 30ea925..8372149 100644
--- a/arch/avr32/cpu/at32ap700x/Makefile
+++ b/arch/avr32/cpu/at32ap700x/Makefile
@@ -22,7 +22,7 @@
 
 include $(TOPDIR)/config.mk
 
-LIB	:= $(obj)lib$(SOC).a
+LIB	:= $(obj)lib$(SOC).o
 
 COBJS	:= portmux.o clk.o mmu.o
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
@@ -31,7 +31,7 @@
 all: $(obj).depend $(LIB)
 
 $(LIB): $(OBJS)
-	$(AR) $(ARFLAGS) $@ $^
+	$(call cmd_link_o_target, $^)
 
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