diff --git a/Makefile b/Makefile
index afe04ed..0bb0366 100644
--- a/Makefile
+++ b/Makefile
@@ -6,6 +6,9 @@ CXX = clang++ -stdlib=libc++ -march=native
 #CXX = armv7a-hardfloat-linux-gnueabi-g++ -static -mfpu=neon -march=armv7-a
 #QEMU = qemu-arm
 
+#CXX = aarch64-unknown-linux-gnu-g++ -static -march=armv8-a+crc+simd -mtune=cortex-a72
+#QEMU = qemu-aarch64
+
 .PHONY: all
 
 all: encode decode