diff --git a/appveyor.yml b/appveyor.yml
index d7cfa5af78..0b5ff859ea 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -61,7 +61,7 @@ after_test:
   - make docs
   - '%LOCALAPPDATA%\Pandoc\pandoc.exe -o DOCUMENTATION.html DOCUMENTATION.md'
   - '%LOCALAPPDATA%\Pandoc\pandoc.exe -o Lua-API.html Lua-API.md'
-  - cp OpenRA.Game/OpenRA.ico .
+  - ps: cp OpenRA.Game/OpenRA.ico .
   - if not exist nsissetup.exe appveyor DownloadFile "http://downloads.sourceforge.net/project/nsis/NSIS 2/2.46/nsis-2.46-setup.exe" -FileName nsissetup.exe
   - nsissetup /S /D=%NSIS_ROOT%
   - '%NSIS_ROOT%\makensis /DSRCDIR="%APPVEYOR_BUILD_FOLDER%" /DDEPSDIR="%APPVEYOR_BUILD_FOLDER%\thirdparty\download\windows" /V3 packaging/windows/OpenRA.nsi'