diff --git a/lisp/ox-html.el b/lisp/ox-html.el
index 9b77e4f8dd..3f55be2eeb 100644
--- a/lisp/ox-html.el
+++ b/lisp/ox-html.el
@@ -2887,13 +2887,15 @@ INFO is a plist containing export properties."
(insert latex-frag)
(org-format-latex cache-relpath nil nil cache-dir nil
"Creating LaTeX Image..." nil processing-type)
- ;; Present save dialogue to be shown for this buffer. We need
- ;; to explicitly disable the dialogue because
+ ;; Present save dialogue to be shown for this buffer and prevent
+ ;; Emacs to jump into this buffer when opening
+ ;; `buffer-file-name' file. We need this because
;; `org-export-copy-buffer' copies `buffer-file-name' local
;; variable thus making Emacs think that the buffer copy is
;; associated with file. Note that despite `buffer-file-name',
;; `org-export-copy-buffer' arranges saving to not perform
;; actual writing onto the disk.
+ (setq buffer-file-name nil)
(restore-buffer-modified-p nil)
(buffer-string))))