diff --git a/lisp/org/ox-publish.el b/lisp/org/ox-publish.el
index bb9e0bd2e30..f324f0d881f 100644
--- a/lisp/org/ox-publish.el
+++ b/lisp/org/ox-publish.el
@@ -365,7 +365,7 @@ The timestamp file name is constructed using FILENAME, publishing
 directory PUB-DIR, and PUB-FUNC publishing function."
   (setq filename (concat filename "::" (or pub-dir "") "::"
 			 (format "%s" (or pub-func ""))))
-  (concat "X" (if (fboundp 'sha1) (sha1 filename) (md5 filename))))
+  (concat "X" (sha1 filename)))
 
 (defun org-publish-needed-p
     (filename &optional pub-dir pub-func _true-pub-dir base-dir)