diff --git a/src/win/error.c b/src/win/error.c
index 4c2cacdb..36868b58 100644
--- a/src/win/error.c
+++ b/src/win/error.c
@@ -97,15 +97,20 @@ uv_err_code uv_translate_sys_error(int sys_errno) {
     case ERROR_ADDRESS_ALREADY_ASSOCIATED:  return UV_EADDRINUSE;
     case WSAEADDRINUSE:                     return UV_EADDRINUSE;
     case WSAEADDRNOTAVAIL:                  return UV_EADDRNOTAVAIL;
+    case WSAEAFNOSUPPORT:                   return UV_EAFNOSUPPORT;
     case WSAEWOULDBLOCK:                    return UV_EAGAIN;
     case WSAEALREADY:                       return UV_EALREADY;
     case ERROR_CONNECTION_REFUSED:          return UV_ECONNREFUSED;
     case WSAECONNREFUSED:                   return UV_ECONNREFUSED;
     case WSAEFAULT:                         return UV_EFAULT;
+    case ERROR_HOST_UNREACHABLE:            return UV_EHOSTUNREACH;
+    case WSAEHOSTUNREACH:                   return UV_EHOSTUNREACH;
     case ERROR_INVALID_DATA:                return UV_EINVAL;
     case WSAEINVAL:                         return UV_EINVAL;
     case ERROR_TOO_MANY_OPEN_FILES:         return UV_EMFILE;
     case WSAEMFILE:                         return UV_EMFILE;
+    case ERROR_NETWORK_UNREACHABLE:         return UV_ENETUNREACH;
+    case WSAENETUNREACH:                    return UV_ENETUNREACH;
     case ERROR_OUTOFMEMORY:                 return UV_ENOMEM;
     case ERROR_NOT_SUPPORTED:               return UV_ENOTSUP;
     case ERROR_INSUFFICIENT_BUFFER:         return UV_EINVAL;
diff --git a/src/win/tcp.c b/src/win/tcp.c
index c8d252c1..4afc08ef 100644
--- a/src/win/tcp.c
+++ b/src/win/tcp.c
@@ -380,7 +380,7 @@ int uv_tcp_bind6(uv_tcp_t* handle, struct sockaddr_in6 addr) {
     handle->flags |= UV_HANDLE_IPV6;
     return uv__bind(handle, AF_INET6, (struct sockaddr*)&addr, sizeof(struct sockaddr_in6));
   } else {
-    uv_new_sys_error(UV_EAFNOSUPPORT);
+    uv_new_sys_error(WSAEAFNOSUPPORT);
     return -1;
   }
 }
@@ -624,7 +624,7 @@ int uv_tcp_connect6(uv_connect_t* req, uv_tcp_t* handle,
   DWORD bytes;
 
   if (!uv_allow_ipv6) {
-    uv_new_sys_error(UV_EAFNOSUPPORT);
+    uv_new_sys_error(WSAEAFNOSUPPORT);
     return -1;
   }