diff --git a/arch/microblaze/Makefile b/arch/microblaze/Makefile
index 56a161147606..01085dd5e6f8 100644
--- a/arch/microblaze/Makefile
+++ b/arch/microblaze/Makefile
@@ -34,12 +34,10 @@ CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_BARREL) += -mxl-barrel-shift
 CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) += -mxl-pattern-compare
 
 ifdef CONFIG_CPU_BIG_ENDIAN
-KBUILD_CFLAGS += -mbig-endian
-KBUILD_AFLAGS += -mbig-endian
+KBUILD_CPPFLAGS += -mbig-endian
 KBUILD_LDFLAGS += -EB
 else
-KBUILD_CFLAGS += -mlittle-endian
-KBUILD_AFLAGS += -mlittle-endian
+KBUILD_CPPFLAGS += -mlittle-endian
 KBUILD_LDFLAGS += -EL
 endif