diff --git a/cpukit/zlib/contrib/masmx64/bld_ml64.bat b/cpukit/zlib/contrib/masmx64/bld_ml64.bat
new file mode 100644
index 0000000000..8f9343d0af
--- /dev/null
+++ b/cpukit/zlib/contrib/masmx64/bld_ml64.bat
@@ -0,0 +1,2 @@
+ml64.exe /Flinffasx64 /c /Zi inffasx64.asm
+ml64.exe /Flgvmat64   /c /Zi gvmat64.asm