diff --git a/mklib.bat b/mklib.bat
new file mode 100755
index 0000000..9845e2a
--- /dev/null
+++ b/mklib.bat
@@ -0,0 +1,4 @@
+@echo off
+nasm -f win64 -D_WIN64 src\asm\low_x86-64.asm
+cl /Ox /DNDEBUG /W4 /Zi /EHsc /c -I ./include -I../xbyak -I../cybozulib -I../cybozulib_ext/include src\fp.cpp
+lib /OUT:lib\mcl.lib /nodefaultlib fp.obj src\asm\low_x86-64.obj