diff --git a/appveyor.yml b/appveyor.yml
index 5676f126..68f2609a 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -9,8 +9,10 @@ environment:
   matrix:
   - VS_VERSION: 9 2008
     VS_PLATFORM: win32
+    VS_VAR: C:\Program Files\Microsoft Visual Studio 9\VC\Vcvarsall.bat
   - VS_VERSION: 9 2008
     VS_PLATFORM: x64
+    VS_VAR: C:\Program Files\Microsoft Visual Studio 9\VC\Vcvarsall.bat
   - VS_VERSION: 10 2010
     VS_PLATFORM: win32
   - VS_VERSION: 10 2010
@@ -30,6 +32,7 @@ environment:
 
 before_build:
 - git submodule update --init --recursive
+- if defined VS_VAR call "%VS_VAR%"
 - cmake -H. -BBuild/VS -G "Visual Studio %VS_VERSION%" -DCMAKE_GENERATOR_PLATFORM=%VS_PLATFORM% -DBUILD_SHARED_LIBS=true -Wno-dev
 
 build: