diff --git a/Makefile b/Makefile
index 1ef49da..c906b08 100644
--- a/Makefile
+++ b/Makefile
@@ -32,6 +32,10 @@ runfast: run.c
 runomp: run.c
 	$(CC) -Ofast -fopenmp -march=native run.c  -lm  -o run
 
+.PHONY: win64
+win64: 
+	x86_64-w64-mingw32-gcc-win32 -Ofast -D_WIN32 -o run.exe -I. run.c win.c
+
 .PHONY: clean
 clean:
 	rm -f run
diff --git a/build_msvc.bat b/build_msvc.bat
new file mode 100644
index 0000000..74d5803
--- /dev/null
+++ b/build_msvc.bat
@@ -0,0 +1 @@
+cl.exe /Ox /openmp /I. run.c win.c