diff --git a/common/os/winerrno.h b/common/os/winerrno.h
new file mode 100644
index 0000000..aebbdbe
--- /dev/null
+++ b/common/os/winerrno.h
@@ -0,0 +1,101 @@
+
+/* Generated with:
+cat /usr/i686-pc-mingw32/sys-root/mingw/include/winerror.h \
+ | awk '/#define WSAE.*WSABASE/{gsub("WSA", ""); print "#undef " $2 "\n#define " $2 " WSA" $2}' \
+ | egrep -v '_QOS|PROVIDER|PROCTABLE'
+*/
+
+#undef EINTR
+#define EINTR WSAEINTR
+#undef EBADF
+#define EBADF WSAEBADF
+#undef EACCES
+#define EACCES WSAEACCES
+#undef EFAULT
+#define EFAULT WSAEFAULT
+#undef EINVAL
+#define EINVAL WSAEINVAL
+#undef EMFILE
+#define EMFILE WSAEMFILE
+#undef EWOULDBLOCK
+#define EWOULDBLOCK WSAEWOULDBLOCK
+#undef EINPROGRESS
+#define EINPROGRESS WSAEINPROGRESS
+#undef EALREADY
+#define EALREADY WSAEALREADY
+#undef ENOTSOCK
+#define ENOTSOCK WSAENOTSOCK
+#undef EDESTADDRREQ
+#define EDESTADDRREQ WSAEDESTADDRREQ
+#undef EMSGSIZE
+#define EMSGSIZE WSAEMSGSIZE
+#undef EPROTOTYPE
+#define EPROTOTYPE WSAEPROTOTYPE
+#undef ENOPROTOOPT
+#define ENOPROTOOPT WSAENOPROTOOPT
+#undef EPROTONOSUPPORT
+#define EPROTONOSUPPORT WSAEPROTONOSUPPORT
+#undef ESOCKTNOSUPPORT
+#define ESOCKTNOSUPPORT WSAESOCKTNOSUPPORT
+#undef EOPNOTSUPP
+#define EOPNOTSUPP WSAEOPNOTSUPP
+#undef EPFNOSUPPORT
+#define EPFNOSUPPORT WSAEPFNOSUPPORT
+#undef EAFNOSUPPORT
+#define EAFNOSUPPORT WSAEAFNOSUPPORT
+#undef EADDRINUSE
+#define EADDRINUSE WSAEADDRINUSE
+#undef EADDRNOTAVAIL
+#define EADDRNOTAVAIL WSAEADDRNOTAVAIL
+#undef ENETDOWN
+#define ENETDOWN WSAENETDOWN
+#undef ENETUNREACH
+#define ENETUNREACH WSAENETUNREACH
+#undef ENETRESET
+#define ENETRESET WSAENETRESET
+#undef ECONNABORTED
+#define ECONNABORTED WSAECONNABORTED
+#undef ECONNRESET
+#define ECONNRESET WSAECONNRESET
+#undef ENOBUFS
+#define ENOBUFS WSAENOBUFS
+#undef EISCONN
+#define EISCONN WSAEISCONN
+#undef ENOTCONN
+#define ENOTCONN WSAENOTCONN
+#undef ESHUTDOWN
+#define ESHUTDOWN WSAESHUTDOWN
+#undef ETOOMANYREFS
+#define ETOOMANYREFS WSAETOOMANYREFS
+#undef ETIMEDOUT
+#define ETIMEDOUT WSAETIMEDOUT
+#undef ECONNREFUSED
+#define ECONNREFUSED WSAECONNREFUSED
+#undef ELOOP
+#define ELOOP WSAELOOP
+#undef ENAMETOOLONG
+#define ENAMETOOLONG WSAENAMETOOLONG
+#undef EHOSTDOWN
+#define EHOSTDOWN WSAEHOSTDOWN
+#undef EHOSTUNREACH
+#define EHOSTUNREACH WSAEHOSTUNREACH
+#undef ENOTEMPTY
+#define ENOTEMPTY WSAENOTEMPTY
+#undef EPROCLIM
+#define EPROCLIM WSAEPROCLIM
+#undef EUSERS
+#define EUSERS WSAEUSERS
+#undef EDQUOT
+#define EDQUOT WSAEDQUOT
+#undef ESTALE
+#define ESTALE WSAESTALE
+#undef EREMOTE
+#define EREMOTE WSAEREMOTE
+#undef EDISCON
+#define EDISCON WSAEDISCON
+#undef ENOMORE
+#define ENOMORE WSAENOMORE
+#undef ECANCELLED
+#define ECANCELLED WSAECANCELLED
+#undef EREFUSED
+#define EREFUSED WSAEREFUSED