diff --git a/arch/ppc64/Makefile b/arch/ppc64/Makefile
index 6350cce82efb9d5c27ed703a6c4fb8e5a9275534..8189953a372c93b6579f150359facb604cb4af46 100644
--- a/arch/ppc64/Makefile
+++ b/arch/ppc64/Makefile
@@ -49,7 +49,7 @@ NM		:= $(NM) --synthetic
 
 endif
 
-CHECKFLAGS	+= -m64 -D__powerpc__
+CHECKFLAGS	+= -m64 -D__powerpc__ -D__powerpc64__
 
 LDFLAGS		:= -m elf64ppc
 LDFLAGS_vmlinux	:= -Bstatic -e $(KERNELLOAD) -Ttext $(KERNELLOAD)