diff --git a/include/uv.h b/include/uv.h
index 705cc2ca..042944af 100644
--- a/include/uv.h
+++ b/include/uv.h
@@ -495,6 +495,13 @@ UV_EXTERN int uv_read2_start(uv_stream_t*, uv_alloc_cb alloc_cb,
 UV_EXTERN int uv_write(uv_write_t* req, uv_stream_t* handle,
     uv_buf_t bufs[], int bufcnt, uv_write_cb cb);
 
+/*
+ * Extended write function for sending handles over a pipe. The pipe must be
+ * initialized with ipc == 1.
+ * send_handle must be a TCP socket or pipe, which is a server or a connection
+ * (listening or connected state).  Bound sockets or pipes will be assumed to
+ * be servers.
+ */
 UV_EXTERN int uv_write2(uv_write_t* req, uv_stream_t* handle, uv_buf_t bufs[],
     int bufcnt, uv_stream_t* send_handle, uv_write_cb cb);
 
diff --git a/src/win/pipe.c b/src/win/pipe.c
index e2e385cb..43aff626 100644
--- a/src/win/pipe.c
+++ b/src/win/pipe.c
@@ -1055,7 +1055,9 @@ static int uv_pipe_write_impl(uv_loop_t* loop, uv_write_t* req,
   }
 
   /* Only TCP handles are supported for sharing. */
-  if (send_handle && send_handle->type != UV_TCP) {
+  if (send_handle && ((send_handle->type != UV_TCP) ||
+      (!(send_handle->flags & UV_HANDLE_BOUND) &&
+       !(send_handle->flags & UV_HANDLE_CONNECTION)))) {
     uv__set_artificial_error(loop, UV_ENOTSUP);
     return -1;
   }