diff --git a/board/stx/stxgp3/Makefile b/board/stx/stxgp3/Makefile
index 5a68f11..5eccfab 100644
--- a/board/stx/stxgp3/Makefile
+++ b/board/stx/stxgp3/Makefile
@@ -23,7 +23,7 @@
 
 include $(TOPDIR)/config.mk
 
-LIB	= $(obj)lib$(BOARD).a
+LIB	= $(obj)lib$(BOARD).o
 
 COBJS-y	+= $(BOARD).o
 COBJS-y	+= law.o
@@ -36,7 +36,7 @@
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
 
 $(LIB):	$(obj).depend $(OBJS) $(SOBJS)
-	$(AR) $(ARFLAGS) $@ $(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
 
 clean:
 	rm -f $(OBJS) $(SOBJS)
diff --git a/board/stx/stxssa/Makefile b/board/stx/stxssa/Makefile
index 9ab41ec..6b47ceb 100644
--- a/board/stx/stxssa/Makefile
+++ b/board/stx/stxssa/Makefile
@@ -23,7 +23,7 @@
 
 include $(TOPDIR)/config.mk
 
-LIB	= $(obj)lib$(BOARD).a
+LIB	= $(obj)lib$(BOARD).o
 
 COBJS-y	+= $(BOARD).o
 COBJS-y	+= law.o
@@ -35,7 +35,7 @@
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
 
 $(LIB):	$(obj).depend $(OBJS) $(SOBJS)
-	$(AR) $(ARFLAGS) $@ $(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
 
 clean:
 	rm -f $(OBJS) $(SOBJS)
diff --git a/board/stx/stxxtc/Makefile b/board/stx/stxxtc/Makefile
index 424ab1c..ac860c1 100644
--- a/board/stx/stxxtc/Makefile
+++ b/board/stx/stxxtc/Makefile
@@ -23,7 +23,7 @@
 
 include $(TOPDIR)/config.mk
 
-LIB	= $(obj)lib$(BOARD).a
+LIB	= $(obj)lib$(BOARD).o
 
 COBJS	= $(BOARD).o
 
@@ -32,7 +32,7 @@
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
 
 $(LIB):	$(obj).depend $(OBJS)
-	$(AR) $(ARFLAGS) $@ $(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
 
 #########################################################################