diff --git a/appveyor.yml b/appveyor.yml
index 8407de65c..c536a52a7 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -7,7 +7,7 @@ before_build:
   - appveyor DownloadFile https://github.com/Wargus/stratagus/releases/download/2015-30-11/dependencies.zip
   - 7z x dependencies.zip
   - choco install nsis -pre
-  - cmake -G "Visual Studio 14 2015" -DCMAKE_PREFIX_PATH="%cd%\\dependencies" -DENABLE_NSIS=ON ..
+  - cmake -G "Visual Studio 14 2015" -DCMAKE_PREFIX_PATH="%cd%\\dependencies" -DENABLE_NSIS=ON -DENABLE_STDIO_REDIRECT=ON ..
   - cd ..
 artifacts:
   - path: build\Stratagus-*.exe