diff --git a/appveyor.yml b/appveyor.yml
index 16a3078..effc8e0 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -14,7 +14,7 @@ install:
 before_build:
   - mkdir build
   - cd build
-  - cmake -DCMAKE_BUILD_TYPE=Debug --G "Visual Studio 15 2017 Win64" .. 
+  - cmake --G "Visual Studio 15 2017 Win64" .. 
   - dir
   
 build: