diff --git a/ChangeLog b/ChangeLog
index 5de7306c442842e5327aa71f1ccbdf2f3f41aa50..52cb7bdf80a03532c86447acb7eb06c2a695aa73 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2003-11-16  Niels Möller  <nisse@harpo.hack.org>
+
+	* yarrow256.c (yarrow256_seed): Use const for the seed_file input.
+
 2003-11-12  Niels Möller  <niels@s3.kth.se>
 
 	* list-obj-sizes.awk: New function for decoding hex values, with a
diff --git a/yarrow.h b/yarrow.h
index a83e53d3a7924b570772cd880882d70a493da444..36f8741e3c2b99a99b0ea199f1664f824aa8870b 100644
--- a/yarrow.h
+++ b/yarrow.h
@@ -81,7 +81,7 @@ yarrow256_init(struct yarrow256_ctx *ctx,
 void
 yarrow256_seed(struct yarrow256_ctx *ctx,
 	       unsigned length,
-	       uint8_t *seed_file);
+	       const uint8_t *seed_file);
 
 /* Returns 1 on reseed */
 int
diff --git a/yarrow256.c b/yarrow256.c
index ba06fdc4ff9f885124dd38bcaa3c09148af558a8..60604a8ddae5e388f5e6d3297f77e92ad822f87f 100644
--- a/yarrow256.c
+++ b/yarrow256.c
@@ -107,7 +107,7 @@ yarrow256_init(struct yarrow256_ctx *ctx,
 void
 yarrow256_seed(struct yarrow256_ctx *ctx,
 	       unsigned length,
-	       uint8_t *seed_file)
+	       const uint8_t *seed_file)
 {
   /* FIXME: Perhaps it's better to use assert ? */
   if (!length)