diff --git a/deps/graph-parser/src/logseq/graph_parser/exporter.cljs b/deps/graph-parser/src/logseq/graph_parser/exporter.cljs
index 5cc591ec77..a4fa8bec93 100644
--- a/deps/graph-parser/src/logseq/graph_parser/exporter.cljs
+++ b/deps/graph-parser/src/logseq/graph_parser/exporter.cljs
@@ -949,7 +949,7 @@
             ;; only happens for few file built-ins like tags and alias
             (and (contains? all-built-in-names (keyword (:block/name page)))
                  (not (:block/tags page)))
-            (assoc :block/tags :logseq.class/Page)))]
+            (assoc :block/tags [:logseq.class/Page])))]
     (cond-> page'
       (:block/namespace page)
       ((fn [block']