diff --git a/src/unix/stream.c b/src/unix/stream.c
index 4ce324074..ff420db23 100644
--- a/src/unix/stream.c
+++ b/src/unix/stream.c
@@ -1188,19 +1188,20 @@ int uv_write2(uv_write_t* req,
   int empty_queue;
 
   assert(bufcnt > 0);
-
-  assert((stream->type == UV_TCP || stream->type == UV_NAMED_PIPE ||
-      stream->type == UV_TTY) &&
-      "uv_write (unix) does not yet support other types of streams");
+  assert((stream->type == UV_TCP ||
+          stream->type == UV_NAMED_PIPE ||
+          stream->type == UV_TTY) &&
+         "uv_write (unix) does not yet support other types of streams");
 
   if (uv__stream_fd(stream) < 0)
-    return uv__set_sys_error(stream->loop, EBADF);
+    return uv__set_artificial_error(stream->loop, UV_EBADF);
 
   if (send_handle) {
     if (stream->type != UV_NAMED_PIPE || !((uv_pipe_t*)stream)->ipc)
-      return uv__set_sys_error(stream->loop, EOPNOTSUPP);
+      return uv__set_artificial_error(stream->loop, UV_EINVAL);
+
     if (uv__stream_fd(send_handle) < 0)
-      return uv__set_sys_error(stream->loop, EBADF);
+      return uv__set_artificial_error(stream->loop, UV_EBADF);
   }
 
   empty_queue = (stream->write_queue_size == 0);