diff --git a/third_party/lisp/mime4cl/ex-sclf.lisp b/third_party/lisp/mime4cl/ex-sclf.lisp
index 1719732fb..19b3fa086 100644
--- a/third_party/lisp/mime4cl/ex-sclf.lisp
+++ b/third_party/lisp/mime4cl/ex-sclf.lisp
@@ -270,11 +270,6 @@ ELEMENT-TYPE."
 
 ;; FILES
 
-(defun native-namestring (pathname)
-  #+sbcl (sb-ext:native-namestring pathname)
-  #-sbcl (let (#+cmu (lisp::*ignore-wildcards* t))
-           (namestring pathname)))
-
 ;; FILE-LENGTH is a bit idiosyncratic in this respect.  Besides, Unix
 ;; allows to get to know the file size without being able to open a
 ;; file; just ask politely.