diff --git a/.appveyor.yml b/.appveyor.yml
index 7b711715..87ff9390 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -20,8 +20,8 @@ before_build:
   - git submodule update --init
   - mkdir build
   - cd build
-  - cmake .. -G "Visual Studio 15 2017" 
-  - cmake --build . --target ALL_BUILD --config Debug
+  - cmake .. -G "NMake Makefiles" 
+  - nmake
 
 build_script:
   - cd ..
diff --git a/cmake/compiler.cmake b/cmake/compiler.cmake
index c640e4bc..9ef1ee51 100644
--- a/cmake/compiler.cmake
+++ b/cmake/compiler.cmake
@@ -17,7 +17,7 @@ else()
 
     # edit and continue
     message(STATUS "Enabling Edit and Continue..")
-    add_definitions(/ZI)
+    add_definitions(/Zi)
 
     # incremental linking
     message(STATUS "Enabling Incremental Linking..")