diff --git a/postmap/postmap.go b/postmap/postmap.go
index 93f24d2..a7e0106 100644
--- a/postmap/postmap.go
+++ b/postmap/postmap.go
@@ -166,7 +166,9 @@ func (pl *postList) fetchLocked(filename string) error {
 	if err != nil {
 		return err
 	}
-	defer slices.SortFunc(pl.posts, postLess)
+	defer func() {
+		slices.SortFunc(pl.posts, postLess)
+	}()
 	for i, post := range pl.posts {
 		if post.Slug == p.Slug {
 			pl.posts[i] = p