diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 35bf7634e095ec34071c5b2d0bbe2b4e6de73d87..a7c353ea01665c5cacc4a7947c5579888c407daa 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -172,7 +172,7 @@ else
 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
 endif
-else
+else ifdef CONFIG_PPC_BOOK3E_64
 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
 endif