diff --git a/board/emk/top5200/Makefile b/board/emk/top5200/Makefile
index 86b8870..72db38d 100644
--- a/board/emk/top5200/Makefile
+++ b/board/emk/top5200/Makefile
@@ -27,7 +27,7 @@
 $(shell mkdir -p $(obj)../common)
 endif
 
-LIB	= $(obj)lib$(BOARD).a
+LIB	= $(obj)lib$(BOARD).o
 
 COBJS	:= $(BOARD).o ../common/flash.o ../common/vpd.o ../common/am79c874.o
 
@@ -36,7 +36,7 @@
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
 
 $(LIB):	$(obj).depend $(OBJS)
-	$(AR) $(ARFLAGS) $@ $(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
 
 clean:
 	rm -f $(SOBJS) $(OBJS)
diff --git a/board/emk/top860/Makefile b/board/emk/top860/Makefile
index 88abd76..6b0a4fa 100644
--- a/board/emk/top860/Makefile
+++ b/board/emk/top860/Makefile
@@ -26,7 +26,7 @@
 $(shell mkdir -p $(obj)../common)
 endif
 
-LIB	= $(obj)lib$(BOARD).a
+LIB	= $(obj)lib$(BOARD).o
 
 COBJS	= $(BOARD).o ../common/flash.o ../common/vpd.o ../common/am79c874.o
 
@@ -35,7 +35,7 @@
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
 
 $(LIB):	$(obj).depend $(OBJS)
-	$(AR) $(ARFLAGS) $@ $(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
 
 #########################################################################