diff --git a/appveyor.yml b/appveyor.yml
new file mode 100644
index 00000000..3f64867a
--- /dev/null
+++ b/appveyor.yml
@@ -0,0 +1,17 @@
+os: Visual Studio 2014 CTP4
+environment:
+  VIPS_VERSION_MAJOR_MINOR: 7.42
+  VIPS_VERSION_PATCH: 3
+install:
+  - ps: $env:VIPS_VERSION = "$env:VIPS_VERSION_MAJOR_MINOR.$env:VIPS_VERSION_PATCH"
+  - ps: Write-Output "VIPS_VERSION=$env:VIPS_VERSION"
+  - ps: Write-Output "Fetching http://www.vips.ecs.soton.ac.uk/supported/$env:VIPS_VERSION_MAJOR_MINOR/win32/vips-dev-$env:VIPS_VERSION.zip"
+  - ps: Start-FileDownload http://www.vips.ecs.soton.ac.uk/supported/$env:VIPS_VERSION_MAJOR_MINOR/win32/vips-dev-$env:VIPS_VERSION.zip -FileName c:\vips-dev-$env:VIPS_VERSION.zip
+  - ps: Write-Output "Extracting c:\vips-dev-$env:VIPS_VERSION.zip"
+  - ps: Invoke-Expression "& 7z -y x c:\vips-dev-$env:VIPS_VERSION.zip -oc:\ | FIND /V `"ing  `""
+  - ps: $env:VIPS_HOME = "c:\vips-dev-$env:VIPS_VERSION"
+  - ps: $env:PATH = "$env:VIPS_HOME\bin;$env:PATH"
+  - ps: Install-Product node 0 x86
+  - npm install --msvs_version=2013
+test_script:
+  - npm test
\ No newline at end of file
diff --git a/src/resize.cc b/src/resize.cc
index c2dcf44d..01c3729f 100755
--- a/src/resize.cc
+++ b/src/resize.cc
@@ -459,8 +459,8 @@ class ResizeWorker : public NanAsyncWorker {
       vips_object_local(hook, shrunk);
       image = shrunk;
       // Recalculate residual float based on dimensions of required vs shrunk images
-      double shrunkWidth = shrunk->Xsize;
-      double shrunkHeight = shrunk->Ysize;
+      int shrunkWidth = shrunk->Xsize;
+      int shrunkHeight = shrunk->Ysize;
       if (rotation == Angle::D90 || rotation == Angle::D270) {
         // Swap input output width and height when rotating by 90 or 270 degrees
         int swap = shrunkWidth;