diff --git a/src/msvcbuild.bat b/src/msvcbuild.bat
index 87957ee3..26af565a 100644
--- a/src/msvcbuild.bat
+++ b/src/msvcbuild.bat
@@ -15,7 +15,7 @@
 @setlocal
 @rem Add more debug flags here, e.g. DEBUGCFLAGS=/DLUA_USE_APICHECK
 @set DEBUGCFLAGS= /DLUA_USE_APICHECK /DLUA_USE_ASSERT /DLUAJIT_USE_SYSMALLOC /fsanitize=address
-@set LJCOMPILE=cl /nologo /c /O2 /W3 /D_CRT_SECURE_NO_DEPRECATE /D_CRT_STDIO_INLINE=__declspec(dllexport)__inline /DLUAJIT_NUMMODE
+@set LJCOMPILE=cl /nologo /c /O2 /W3 /D_CRT_SECURE_NO_DEPRECATE /D_CRT_STDIO_INLINE=__declspec(dllexport)__inline /DLUAJIT_NUMMODE=2
 @set LJLINK=link /nologo
 @set LJMT=mt /nologo
 @set LJLIB=lib /nologo /nodefaultlib