diff --git a/dist-build/msys.sh b/dist-build/msys-win32.sh
similarity index 100%
rename from dist-build/msys.sh
rename to dist-build/msys-win32.sh
diff --git a/dist-build/msys-win64.sh b/dist-build/msys-win64.sh
new file mode 100755
index 00000000..06b22ff7
--- /dev/null
+++ b/dist-build/msys-win64.sh
@@ -0,0 +1,10 @@
+#! /bin/sh
+
+export CFLAGS="-O3 -fomit-frame-pointer -m64"
+export PREFIX="$(pwd)/libsodium-win64"
+
+./configure --prefix="$PREFIX" --exec-prefix="$PREFIX" \
+            --host=x86_64-w64-mingw32 && \
+make && \
+make check && \
+make install