diff --git a/lisp/emacs-lisp/package.el b/lisp/emacs-lisp/package.el
index 5445fa970f8..2c37e19980d 100644
--- a/lisp/emacs-lisp/package.el
+++ b/lisp/emacs-lisp/package.el
@@ -2239,6 +2239,7 @@ directory."
           (dired-mode))
       (insert-file-contents-literally file)
       (set-visited-file-name file)
+      (set-buffer-modified-p nil)
       (when (string-match "\\.tar\\'" file) (tar-mode)))
     (package-install-from-buffer)))