diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6417053ac..a6e511b66 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -157,7 +157,7 @@ SET (PROJECT_VERSION "${ASSIMP_VERSION}")
 
 SET( ASSIMP_PACKAGE_VERSION "0" CACHE STRING "the package-specific version used for uploading the sources" )
 
-# Enable C++1 globally
+# Enable C++11 support globally
 set_property( GLOBAL PROPERTY CXX_STANDARD 11 )
 
 IF(NOT IGNORE_GIT_HASH)
diff --git a/appveyor.yml b/appveyor.yml
index a1890b9cb..78ef4da75 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -15,8 +15,8 @@ matrix:
     
 image:
   - Visual Studio 2013
-#  - Visual Studio 2015
-#  - Visual Studio 2017
+  - Previous Visual Studio 2015
+  - Previous Visual Studio 2017
     
 platform:
   - Win32
@@ -28,8 +28,8 @@ install:
   - set PATH=C:\Ruby24-x64\bin;%PATH%
   - set CMAKE_DEFINES -DASSIMP_WERROR=ON
   - if "%APPVEYOR_BUILD_WORKER_IMAGE%"=="Visual Studio 2013" set CMAKE_GENERATOR_NAME=Visual Studio 12 2013
-  - if "%APPVEYOR_BUILD_WORKER_IMAGE%"=="Visual Studio 2015" set CMAKE_GENERATOR_NAME=Visual Studio 14 2015
-  - if "%APPVEYOR_BUILD_WORKER_IMAGE%"=="Visual Studio 2017" set CMAKE_GENERATOR_NAME=Visual Studio 15 2017
+  - if "%APPVEYOR_BUILD_WORKER_IMAGE%"=="Previous Visual Studio 2015" set CMAKE_GENERATOR_NAME=Visual Studio 14 2015
+  - if "%APPVEYOR_BUILD_WORKER_IMAGE%"=="Previous Visual Studio 2017" set CMAKE_GENERATOR_NAME=Visual Studio 15 2017
   - if "%platform%"=="x64" set CMAKE_GENERATOR_NAME=%CMAKE_GENERATOR_NAME% Win64
   - cmake %CMAKE_DEFINES% -G "%CMAKE_GENERATOR_NAME%"
   - set PATH=%PATH%;"C:\\Program Files (x86)\\Inno Setup 5"