diff --git a/README.md b/README.md
index cd46aa9..6712f16 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 [![Build Status](https://travis-ci.org/TLINDEN/udpxd.svg?branch=master)](https://travis-ci.org/TLINDEN/udpxd)
+[![Build status](https://ci.appveyor.com/api/projects/status/0tujxsr8u324dv9v?svg=true)](https://ci.appveyor.com/project/TLINDEN/udpxd)
 
 ## UDPXD - A general purpose UDP relay/port forwarder/proxy
 
diff --git a/appveyor.yml b/appveyor.yml
new file mode 100644
index 0000000..75cdf0c
--- /dev/null
+++ b/appveyor.yml
@@ -0,0 +1,34 @@
+environment:
+  global:
+    CYG_ROOT: C:\cygwin
+    CYG_BASH: C:\cygwin\bin\bash
+    CYG_MIRROR: http://cygwin.mirror.constant.com
+    CYG_CACHE: C:\cygwin\var\cache\setup
+
+os: unstable
+
+cache:
+    - '%CYG_CACHE%'
+
+platform:
+  - Win32
+
+test: off
+
+init:
+  - git config --global core.autocrlf input
+
+install:
+    - ps: 'Start-FileDownload "http://cygwin.com/setup-x86.exe" -FileName "setup-x86.exe"'
+    - 'setup-x86.exe --quiet-mode --no-shortcuts --only-site --root "%CYG_ROOT%" --site "%CYG_MIRROR%" --local-package-dir "%CYG_CACHE%" --packages bind,netcat > NUL 2>&1'
+    - '%CYG_BASH% -lc "cygcheck -dc cygwin"'
+
+build_script:
+  - '%CYG_BASH% -lc "cd $APPVEYOR_BUILD_FOLDER; exec 0</dev/null; make"'
+  - '%CYG_BASH% -lc "cd $APPVEYOR_BUILD_FOLDER; exec 0</dev/null; cygstart --hide ./udpxd -l 127.0.0.1:53 -d 8.8.8.8:53 -f"'
+  - '%CYG_BASH% -lc "cd $APPVEYOR_BUILD_FOLDER; exec 0</dev/null; cygstart --hide ./udpxd -l [::1]:53 -d 8.8.8.8:53 -f"'
+  - '%CYG_BASH% -lc "cd $APPVEYOR_BUILD_FOLDER; exec 0</dev/null; dig www.google.de soa @127.0.0.1"'
+  - '%CYG_BASH% -lc "cd $APPVEYOR_BUILD_FOLDER; exec 0</dev/null; dig www.google.de soa @::1"'
+
+
+  
diff --git a/host.c b/host.c
index 751976a..91a89f4 100644
--- a/host.c
+++ b/host.c
@@ -162,7 +162,7 @@ void host_dump(host_t *host) {
   fprintf(stderr, "host -   ip: %s\n", host->ip);
   fprintf(stderr, "       port: %d\n", host->port);
   fprintf(stderr, "       isv6: %d\n", host->is_v6);
-  fprintf(stderr, "       size: %ld\n", host->size);
+  fprintf(stderr, "       size: %ld\n", (long int)host->size);
   fprintf(stderr, "        src: %p\n", host->sock);
 }