diff --git a/build_win64.cmd b/build_win64.cmd
index 994609aa..0b82c944 100644
--- a/build_win64.cmd
+++ b/build_win64.cmd
@@ -9,7 +9,7 @@ SET PATH=%POKERTH_WIN64_LIB_DIR%\qt\bin;%POKERTH_WIN64_LIB_DIR%\mingw64\bin;%PAT
 SET QMAKESPEC=win32-g++
 SET QTDIR=%POKERTH_WIN64_LIB_DIR%\qt
 
-qmake DEFINES+=BOOST_USE_WINDOWS_H pokerth.pro
+qmake CONFIG+=pkth_win64 DEFINES+=BOOST_USE_WINDOWS_H pokerth.pro
 mingw32-make release
 IF NOT "%ERRORLEVEL%"=="0" exit /b %ERRORLEVEL%
 REM Add automatic packaging or copying here.