diff --git a/appveyor.yml b/appveyor.yml
index 74fdb4c4..dfa1dbf5 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -19,7 +19,7 @@ build_script:
   - md build
   - cd build
   - cmake -DCMAKE_BUILD_TYPE=Release ..
-  - cmake --build .
+  - cmake --build . --config Release
   - cd ..
 
 after_build: