diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 9f80deb..eb1224c 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -124,12 +124,14 @@
 head-$(CONFIG_PPC_FPU)		+= arch/powerpc/kernel/fpu.o
 endif
 
-core-y				+= arch/powerpc/kernel/ \
-				   arch/$(OLDARCH)/kernel/ \
-				   arch/powerpc/mm/ \
-				   arch/powerpc/lib/ \
-				   arch/powerpc/sysdev/ \
-				   arch/powerpc/platforms/
+core-y				+= arch/powerpc/kernel/
+core-y				+= arch/$(OLDARCH)/kernel/
+core-$(CONFIG_PPC32)		+= arch/powerpc/mm/
+core-$(CONFIG_PPC64)		+= arch/$(OLDARCH)/mm/
+core-$(CONFIG_PPC32)		+= arch/powerpc/lib/
+libs-$(CONFIG_PPC64)		+= arch/$(OLDARCH)/lib/
+core-y				+= arch/powerpc/sysdev/
+core-y				+= arch/powerpc/platforms/
 core-$(CONFIG_PPC32)		+= arch/ppc/syslib/
 core-$(CONFIG_MATH_EMULATION)	+= arch/ppc/math-emu/
 core-$(CONFIG_XMON)		+= arch/powerpc/xmon/
@@ -140,17 +142,20 @@
 
 drivers-$(CONFIG_OPROFILE)	+= arch/powerpc/oprofile/
 
-BOOT_TARGETS = zImage zImage.initrd znetboot znetboot.initrd vmlinux.sm
-
-.PHONY: $(BOOT_TARGETS)
-
-all: uImage zImage
+defaultimage-$(CONFIG_PPC32)	:= uImage zImage
+defaultimage-$(CONFIG_PPC_ISERIES) := vmlinux
+KBUILD_IMAGE := $(defaultimage-y)
+all: $(KBUILD_IMAGE)
 
 CPPFLAGS_vmlinux.lds	:= -Upowerpc
 
 # All the instructions talk about "make bzImage".
 bzImage: zImage
 
+BOOT_TARGETS = zImage zImage.initrd znetboot znetboot.initrd vmlinux.sm
+
+.PHONY: $(BOOT_TARGETS)
+
 boot := arch/$(OLDARCH)/boot
 
 $(BOOT_TARGETS): vmlinux