diff --git a/lisp/ox.el b/lisp/ox.el
index b63507606..e9cc0ed8f 100644
--- a/lisp/ox.el
+++ b/lisp/ox.el
@@ -264,13 +264,17 @@ See `org-export-inline-image-p' for more information about
 rules.")
 
 (defconst org-export-ignored-local-variables
-  '( org-font-lock-keywords org-element--cache-change-tic
-     org-element--cache-change-tic org-element--cache-size
-     org-element--headline-cache-size
-     org-element--cache-sync-keys-value
-     org-element--cache-change-warning org-element--headline-cache
-     org-element--cache org-element--cache-sync-keys
-     org-element--cache-sync-requests org-element--cache-sync-timer)
+  '( org-font-lock-keywords
+     org-element--cache org-element--cache-size
+     org-element--headline-cache org-element--headline-cache-size
+     org-element--cache-hash-left org-element--cache-hash-right
+     org-element--cache-sync-requests org-element--cache-sync-timer
+     org-element--cache-sync-keys-value org-element--cache-change-tic
+     org-element--cache-last-buffer-size
+     org-element--cache-diagnostics-ring
+     org-element--cache-diagnostics-ring-size
+     org-element--cache-gapless
+     org-element--cache-change-warning)
   "List of variables not copied through upon buffer duplication.
 Export process takes place on a copy of the original buffer.
 When this copy is created, all Org related local variables not in