diff --git a/appveyor.yml b/appveyor.yml
index e3f11b19c..e9a5bab38 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -13,9 +13,9 @@ build_script:
   - 7z a fbn-code.7z %APPVEYOR_BUILD_FOLDER%\*      
   - msbuild "projectfiles\visualstudio-2019\fba_vs2019.sln" /m /property:Configuration=Release /property:Platform=x86 /verbosity:minimal /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
   - msbuild "projectfiles\visualstudio-2019\fba_vs2019.sln" /m /property:Configuration=Release /property:Platform=x64 /verbosity:minimal /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
-  - bash -lc "exec 0</dev/null && cd $APPVEYOR_BUILD_FOLDER && mingw32-make mingw510 -j5 RELEASEBUILD=1 SKIPDEPEND=1"
+  - bash -lc "exec 0</dev/null && cd $APPVEYOR_BUILD_FOLDER && mingw32-make mingw510 -j5 RELEASEBUILD=1 SKIPDEPEND=1 USE_UCRT=1"
   - 7z a fbn-win32-gcc.7z %APPVEYOR_BUILD_FOLDER%\*.exe %APPVEYOR_BUILD_FOLDER%\fba.chm  %APPVEYOR_BUILD_FOLDER%\*.zip %APPVEYOR_BUILD_FOLDER%\src\license.txt %APPVEYOR_BUILD_FOLDER%\whatsnew.html      
-  - bash -lc "exec 0</dev/null && cd $APPVEYOR_BUILD_FOLDER && rm -rf obj && mingw32-make mingw510 -j5 SKIPDEPEND=1"
+  - bash -lc "exec 0</dev/null && cd $APPVEYOR_BUILD_FOLDER && rm -rf obj && mingw32-make mingw510 -j5 SKIPDEPEND=1 USE_UCRT=1"
   - 7z a fbn-win32-debug-gcc.7z %APPVEYOR_BUILD_FOLDER%\fbneod.exe %APPVEYOR_BUILD_FOLDER%\fba.chm  %APPVEYOR_BUILD_FOLDER%\*.zip %APPVEYOR_BUILD_FOLDER%\src\license.txt %APPVEYOR_BUILD_FOLDER%\whatsnew.html        
   - 7z a fbn-win32-vs.7z %APPVEYOR_BUILD_FOLDER%\projectfiles\visualstudio-2019\Win32\Release\*.exe %APPVEYOR_BUILD_FOLDER%\fba.chm  %APPVEYOR_BUILD_FOLDER%\*.zip %APPVEYOR_BUILD_FOLDER%\src\license.txt %APPVEYOR_BUILD_FOLDER%\whatsnew.html %APPVEYOR_BUILD_FOLDER%\projectfiles\visualstudio-2019\generated\gamelist.txt     
   - 7z a fbn-x64-vs.7z %APPVEYOR_BUILD_FOLDER%\projectfiles\visualstudio-2019\x64\Release\*.exe %APPVEYOR_BUILD_FOLDER%\fba.chm  %APPVEYOR_BUILD_FOLDER%\*.zip %APPVEYOR_BUILD_FOLDER%\src\license.txt %APPVEYOR_BUILD_FOLDER%\whatsnew.html %APPVEYOR_BUILD_FOLDER%\projectfiles\visualstudio-2019\generated\gamelist.txt