diff --git a/appveyor.yml b/appveyor.yml
index d732c72e7..e33202409 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -27,10 +27,12 @@ install:
 # Make compiler command line tools available
 - call c:\projects\assimp\scripts\appveyor\compiler_setup.bat
 
-build_script:
- - cd c:\projects\assimp
- - cmake CMakeLists.txt -G "Visual Studio %Configuration%"
- - msbuild /m /p:Configuration=Release /p:Platform="Win32" Assimp.sln
+build_script:  
+- cd c:\projects\assimp
+- if "%platform%" equ "x64" (cmake CMakeLists.txt -G "Visual Studio %Configuration% Win64")
+- if "%platform%" equ "x86" (cmake CMakeLists.txt -G "Visual Studio %Configuration%")
+- if "%platform%" equ "x64" (msbuild /m /p:Configuration=Release /p:Platform="x64" Assimp.sln)
+- if "%platform%" equ "x86" (msbuild /m /p:Configuration=Release /p:Platform="Win32" Assimp.sln)
 
 after_build:
   - 7z a assimp.7z c:\projects\assimp\bin\release\* c:\projects\assimp\lib\release\*