diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 1ce57b42f390f..fdb0133142ff5 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -62,7 +62,7 @@ LD		+= -EL
 UTS_MACHINE	:= aarch64
 endif
 
-CHECKFLAGS	+= -D__aarch64__
+CHECKFLAGS	+= -D__aarch64__ -m64
 
 ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y)
 KBUILD_CFLAGS_MODULE	+= -mcmodel=large