diff --git a/platform_build/win32_ms_cmdline/build.bat b/platform_build/win32_ms_cmdline/build.bat
index f338ebb2..fb1a8f74 100644
--- a/platform_build/win32_ms_cmdline/build.bat
+++ b/platform_build/win32_ms_cmdline/build.bat
@@ -5,7 +5,7 @@ if "%PLTSDKHOME%" == "" goto errorpltsdkhome
 if "%CHOME%" == "" goto errorchome
 if "%ALHOME%" == "" goto erroralhome
 if "%DXHOME%" == "" goto errordxhome
-set COPTIONS=/I"%DXHOME%\include" /I"%CHOME%\include" /I"%PLTSDKHOME%\include" /I"%JAVA_HOME%\include" /I"%JAVA_HOME%\include\win32" /I"%ALHOME%\include" /I"..\..\src\native\common" /Ox /Ob2 /Oi /Ot /Oy /FD /EHsc /MT /Gy /W2 /nologo /c /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_USRDLL" /D "LWJGL_EXPORTS" /D "_WINDLL"
+set COPTIONS=/Wp64 /I"%DXHOME%\include" /I"%CHOME%\include" /I"%PLTSDKHOME%\include" /I"%JAVA_HOME%\include" /I"%JAVA_HOME%\include\win32" /I"%ALHOME%\include" /I"..\..\src\native\common" /Ox /Ob2 /Oi /Ot /Oy /FD /EHsc /MT /Gy /W2 /nologo /c /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_USRDLL" /D "LWJGL_EXPORTS" /D "_WINDLL"
 rem *************************************************
 rem ** Build using free compiler requires jawt.dll **
 rem ** and awt.dll in current dir. /delayload      **