diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 080d90a203..be2ed4711b 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2015-08-17  Doug Evans  <dje@google.com>
+
+	* ui-out.c (default_ui_out_impl): Add comment.
+
 2015-08-17  Iain Buclaw  <ibuclaw@gdcproject.org>
 
 	* d-exp.y (type_aggregate_p): New function.
diff --git a/gdb/ui-out.c b/gdb/ui-out.c
index a18fe2e2c2..a87c1d36a0 100644
--- a/gdb/ui-out.c
+++ b/gdb/ui-out.c
@@ -213,7 +213,7 @@ const struct ui_out_impl default_ui_out_impl =
   default_message,
   default_wrap_hint,
   default_flush,
-  NULL,
+  NULL, /* redirect */
   default_data_destroy,
   0, /* Does not need MI hacks.  */
 };