diff --git a/t/t6030-bisect-porcelain.sh b/t/t6030-bisect-porcelain.sh
index 2a5b7d8379..58f3d9c675 100755
--- a/t/t6030-bisect-porcelain.sh
+++ b/t/t6030-bisect-porcelain.sh
@@ -872,7 +872,7 @@ test_expect_success 'broken branch creation' '
 
 echo "" > expected.ok
 cat > expected.missing-tree.default <<EOF
-fatal: unable to read tree $deleted
+fatal: unable to read tree ($deleted)
 EOF
 
 test_expect_success 'bisect fails if tree is broken on start commit' '
diff --git a/tree-walk.c b/tree-walk.c
index b517792ba2..690fa6569b 100644
--- a/tree-walk.c
+++ b/tree-walk.c
@@ -100,7 +100,7 @@ void *fill_tree_descriptor(struct repository *r,
 	if (oid) {
 		buf = read_object_with_reference(r, oid, OBJ_TREE, &size, NULL);
 		if (!buf)
-			die("unable to read tree %s", oid_to_hex(oid));
+			die(_("unable to read tree (%s)"), oid_to_hex(oid));
 	}
 	init_tree_desc(desc, buf, size);
 	return buf;