diff --git a/lib.c b/lib.c
index 5d33bb87..b7a636c9 100644
--- a/lib.c
+++ b/lib.c
@@ -170,14 +170,6 @@ exit_ (SCM x) ///((name . "exit"))
   exit (VALUE (x));
 }
 
-SCM
-append (SCM x) ///((arity . n))
-{
-  if (x == cell_nil) return cell_nil;
-  if (cdr (x) == cell_nil) return car (x);
-  return append2 (car (x), append (cdr (x)));
-}
-
 //MINI_MES
 // char const*
 // string_to_cstring (SCM s)
diff --git a/module/mes/base-0.mes b/module/mes/base-0.mes
index 11359fc2..eab39910 100644
--- a/module/mes/base-0.mes
+++ b/module/mes/base-0.mes
@@ -110,6 +110,11 @@
 (define-macro (include-from-path file)
   (list 'load (list string-append "module/" file)))
 
+(define (append . rest)
+  (if (null? rest) '()
+      (if (null? (cdr rest)) (car rest)
+          (append2 (car rest) (apply append (cdr rest))))))
+
 (include "module/mes/type-0.mes")
 
 (define (memq x lst)
@@ -129,8 +134,8 @@
 (define (mes-load-module-env module a)
   (push! *input-ports* (current-input-port))
   (set-current-input-port (open-input-file (string-append *mes-prefix* (module->file module))))
-  (let ((x (core:eval (append (cons 'begin (read-input-file-env a))
-                              '((current-module)))
+  (let ((x (core:eval (append2 (cons 'begin (read-input-file-env a))
+                               '((current-module)))
                       a)))
     (set-current-input-port (pop! *input-ports*))
     x))
diff --git a/scaffold/mini-mes.c b/scaffold/mini-mes.c
index 5d500975..a67277a5 100644
--- a/scaffold/mini-mes.c
+++ b/scaffold/mini-mes.c
@@ -1441,14 +1441,6 @@ exit_ (SCM x) ///((name . "exit"))
   exit (VALUE (x));
 }
 
-SCM
-append (SCM x) ///((arity . n))
-{
-  if (x == cell_nil) return cell_nil;
-  if (cdr (x) == cell_nil) return car (x);
-  return append2 (car (x), append (cdr (x)));
-}
-
 SCM
 xassq (SCM x, SCM a) ///for speed in core only
 {