diff --git a/gio/ginputstream.c b/gio/ginputstream.c
index a1ba73608..16a03c06f 100644
--- a/gio/ginputstream.c
+++ b/gio/ginputstream.c
@@ -1231,7 +1231,7 @@ g_input_stream_clear_pending (GInputStream *stream)
   stream->priv->pending = FALSE;
 }
 
-/**
+/*< internal >
  * g_input_stream_async_read_is_via_threads:
  * @stream: input stream
  *
diff --git a/gio/goutputstream.c b/gio/goutputstream.c
index 2bec89e7e..ea05b41bf 100644
--- a/gio/goutputstream.c
+++ b/gio/goutputstream.c
@@ -1683,7 +1683,7 @@ g_output_stream_clear_pending (GOutputStream *stream)
   stream->priv->pending = FALSE;
 }
 
-/**
+/*< internal >
  * g_output_stream_async_write_is_via_threads:
  * @stream: a #GOutputStream.
  *