diff --git a/post/cpu/ppc4xx/Makefile b/post/cpu/ppc4xx/Makefile
index 614cef0..b7435c8 100644
--- a/post/cpu/ppc4xx/Makefile
+++ b/post/cpu/ppc4xx/Makefile
@@ -4,18 +4,15 @@
 #
 # SPDX-License-Identifier:	GPL-2.0+
 #
-include $(OBJTREE)/include/autoconf.mk
 
-LIB	= libpostppc4xx.o
-
-AOBJS-$(CONFIG_HAS_POST)	+= cache_4xx.o
-COBJS-$(CONFIG_HAS_POST)	+= cache.o
-COBJS-$(CONFIG_HAS_POST)	+= denali_ecc.o
-COBJS-$(CONFIG_HAS_POST)	+= ether.o
-COBJS-$(CONFIG_HAS_POST)	+= fpu.o
-COBJS-$(CONFIG_HAS_POST)	+= ocm.o
-COBJS-$(CONFIG_HAS_POST)	+= spr.o
-COBJS-$(CONFIG_HAS_POST)	+= uart.o
-COBJS-$(CONFIG_HAS_POST)	+= watchdog.o
+CPPFLAGS += -I$(TOPDIR)
 
-include $(TOPDIR)/post/rules.mk
+obj-$(CONFIG_HAS_POST)	+= cache_4xx.o
+obj-$(CONFIG_HAS_POST)	+= cache.o
+obj-$(CONFIG_HAS_POST)	+= denali_ecc.o
+obj-$(CONFIG_HAS_POST)	+= ether.o
+obj-$(CONFIG_HAS_POST)	+= fpu.o
+obj-$(CONFIG_HAS_POST)	+= ocm.o
+obj-$(CONFIG_HAS_POST)	+= spr.o
+obj-$(CONFIG_HAS_POST)	+= uart.o
+obj-$(CONFIG_HAS_POST)	+= watchdog.o