diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1765fdf..29643ed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -48,10 +48,14 @@ The format is based on [Keep a Changelog].
   versions of Rustfmt ([#69]).
 * When a formatter cannot be found, orphaned stderr processes are no
   longer created and left around forever ([#47]).
+* Apheleia no longer resets the major mode to its default value when
+  formatting a buffer. This was never intended and the bug has now
+  been fixed ([#58]).
 
 [#23]: https://github.com/raxod502/apheleia/issues/23
 [#47]: https://github.com/raxod502/apheleia/issues/47
 [#52]: https://github.com/raxod502/apheleia/issues/52
+[#58]: https://github.com/raxod502/apheleia/issues/58
 [#60]: https://github.com/raxod502/apheleia/issues/60
 [#62]: https://github.com/raxod502/apheleia/issues/62
 [#64]: https://github.com/raxod502/apheleia/issues/64
diff --git a/apheleia.el b/apheleia.el
index c6168fe..84ae1b4 100644
--- a/apheleia.el
+++ b/apheleia.el
@@ -458,10 +458,8 @@ as in `write-region'. WRITE-REGION is used instead of the actual
     (set-visited-file-modtime)
     (set-buffer-modified-p nil)))
 
-(defun apheleia--write-file-silently (&optional filename)
-  "Write contents of current buffer into file FILENAME, silently.
-FILENAME defaults to value of variable `buffer-file-name'. Do not
-mark the buffer as visiting FILENAME."
+(defun apheleia--save-buffer-silently ()
+  "Save the current buffer to its backing file, silently."
   (cl-letf* ((write-region (symbol-function #'write-region))
              ((symbol-function #'write-region)
               (lambda (start end filename &optional
@@ -484,7 +482,7 @@ mark the buffer as visiting FILENAME."
               (lambda (&rest args)
                 (unless (equal args '(after-set-visited-file-name-hook))
                   (apply run-hooks args)))))
-    (write-file (or filename buffer-file-name))))
+    (save-buffer)))
 
 (defun apheleia--create-rcs-patch (old-buffer new-buffer callback)
   "Generate RCS patch from text in OLD-BUFFER to text in NEW-BUFFER.
@@ -1004,7 +1002,7 @@ operating, to prevent an infinite loop.")
            (with-demoted-errors "Apheleia: %s"
              (when buffer-file-name
                (let ((apheleia--format-after-save-in-progress t))
-                 (apheleia--write-file-silently buffer-file-name)))
+                 (apheleia--save-buffer-silently)))
              (run-hooks 'apheleia-post-format-hook))))))))
 
 ;; Use `progn' to force the entire minor mode definition to be copied