diff --git a/lisp/files.el b/lisp/files.el
index 03d6df4c037..b7d104853c3 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -5139,7 +5139,8 @@ Before and after saving the buffer, this function runs
 This allows you to stop `save-some-buffers' from asking
 about certain files that you'd usually rather not save."
   :group 'auto-save
-  :type 'function)
+  :type 'function
+  :version "26.1")
 
 (defun save-some-buffers (&optional arg pred)
   "Save some modified file-visiting buffers.  Asks user about each one.