diff --git a/Makefile b/Makefile
index 54698fb8396a..11c9ca74825e 100644
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,8 @@ NAME = Blurry Fish Butt
 # Comments in this file are targeted only to the developer, do not
 # expect to learn how to build the kernel reading this file.
 
+SUBLEVEL = 0
+
 # o Do not use make's built-in rules and variables
 #   (this increases performance and avoids hard-to-debug behaviour);
 # o Look for make include files relative to root of kernel src
@@ -248,7 +250,13 @@ SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
 # "make" in the configured kernel build directory always uses that.
 # Default value for CROSS_COMPILE is not to prefix executables
 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
+ARCH		?= arm64
 ARCH		?= $(SUBARCH)
+ifeq ($(ARCH),arm64)
+ifneq ($(wildcard $(srctree)/../prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9),)
+CROSS_COMPILE	?= $(srctree)/../prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android-
+endif
+endif
 CROSS_COMPILE	?= $(CONFIG_CROSS_COMPILE:"%"=%)
 
 # Architecture as present in compile.h