diff --git a/unsigned-char.patch b/unsigned-char.patch
index e1bdd9c..e182bd3 100644
--- a/unsigned-char.patch
+++ b/unsigned-char.patch
@@ -1,3 +1,7 @@
+From: Andreas Schwab <schwab@suse.de>
+Date: 2019-01-31 12:45:09+0100
+
+Don't depend on the signedness of char.
 ---
  ell/utf8.c |    2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)