--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -43,6 +43,7 @@ $(obj)/cuboot-taishan.o: BOOTCFLAGS += -
- $(obj)/cuboot-katmai.o: BOOTCFLAGS += -mcpu=405
+ $(obj)/cuboot-katmai.o: BOOTCFLAGS += -mcpu=440
$(obj)/cuboot-acadia.o: BOOTCFLAGS += -mcpu=405
$(obj)/cuboot-magicbox.o: BOOTCFLAGS += -mcpu=405
+$(obj)/cuboot-openrb.o: BOOTCFLAGS += -mcpu=405