diff --git a/appveyor.yml b/appveyor.yml
index 56f333c..e40e6ce 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -18,5 +18,5 @@ build:
 build_script:
  - cmake --version
  - cd c:\projects\gmio.git
- - cmake -G "Visual Studio 12 2013" -DCMAKE_BUILD_TYPE=$(CONFIGURATION) -DCMAKE_DEBUG_POSTFIX=_d -DGMIO_BUILD_SHARED_LIBS=$(APPVEYOR_SHARED_LIBS)
- - msbuild /p:Configuration=$(CONFIGURATION) /p:Platform="Win32" gmio.sln /verbosity:detailed /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
\ No newline at end of file
+ - cmake -G "Visual Studio 12 2013" -DCMAKE_BUILD_TYPE=%CONFIGURATION% -DCMAKE_DEBUG_POSTFIX=_d -DGMIO_BUILD_SHARED_LIBS=%APPVEYOR_SHARED_LIBS%
+ - msbuild /p:Configuration=%CONFIGURATION% /p:Platform="Win32" gmio.sln /verbosity:detailed /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
\ No newline at end of file