diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index f4b90c1e4d..d0ca165c9b 100644
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -57,7 +57,7 @@ struct object_entry {
  * nice "minimum seek" order.
  */
 static struct object_entry *objects;
-static struct object_entry **written_list;
+static struct pack_idx_entry **written_list;
 static uint32_t nr_objects, nr_alloc, nr_result, nr_written;
 
 static int non_empty;
@@ -579,7 +579,7 @@ static off_t write_one(struct sha1file *f,
 		e->idx.offset = 0;
 		return 0;
 	}
-	written_list[nr_written++] = e;
+	written_list[nr_written++] = &e->idx;
 
 	/* make sure off_t is sufficiently large not to wrap */
 	if (offset > offset + size)
@@ -607,7 +607,7 @@ static void write_pack_file(void)
 
 	if (do_progress)
 		start_progress(&progress_state, "Writing %u objects...", "", nr_result);
-	written_list = xmalloc(nr_objects * sizeof(struct object_entry *));
+	written_list = xmalloc(nr_objects * sizeof(*written_list));
 
 	do {
 		unsigned char sha1[20];
@@ -654,8 +654,8 @@ static void write_pack_file(void)
 			umask(mode);
 			mode = 0444 & ~mode;
 
-			idx_tmp_name = write_idx_file(NULL,
-				(struct pack_idx_entry **) written_list, nr_written, sha1);
+			idx_tmp_name = write_idx_file(NULL, written_list,
+						      nr_written, sha1);
 			snprintf(tmpname, sizeof(tmpname), "%s-%s.pack",
 				 base_name, sha1_to_hex(sha1));
 			if (adjust_perm(pack_tmp_name, mode))
@@ -677,7 +677,7 @@ static void write_pack_file(void)
 
 		/* mark written objects as written to previous pack */
 		for (j = 0; j < nr_written; j++) {
-			written_list[j]->idx.offset = (off_t)-1;
+			written_list[j]->offset = (off_t)-1;
 		}
 		nr_remaining -= nr_written;
 	} while (nr_remaining && i < nr_objects);