diff --git a/form/fld_dup.c b/form/fld_dup.c
index 2df40ee..e195df9 100644
--- a/form/fld_dup.c
+++ b/form/fld_dup.c
@@ -1,5 +1,6 @@
 /****************************************************************************
- * Copyright (c) 1998-2010,2012 Free Software Foundation, Inc.              *
+ * Copyright 2020 Thomas E. Dickey                                          *
+ * Copyright 1998-2010,2012 Free Software Foundation, Inc.                  *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
  * copy of this software and associated documentation files (the            *
@@ -32,7 +33,7 @@
 
 #include "form.priv.h"
 
-MODULE_ID("$Id: fld_dup.c,v 1.14 2012/03/11 00:37:16 tom Exp $")
+MODULE_ID("$Id: fld_dup.c,v 1.18 2020/05/24 01:40:20 anonymous.maarten Exp $")
 
 /*---------------------------------------------------------------------------
 |   Facility      :  libnform
@@ -47,7 +48,7 @@
 |
 |   Return Values :  Pointer to the new field or NULL if failure
 +--------------------------------------------------------------------------*/
-NCURSES_EXPORT(FIELD *)
+FORM_EXPORT(FIELD *)
 dup_field(FIELD *field, int frow, int fcol)
 {
   FIELD *New_Field = (FIELD *)0;
@@ -60,8 +61,8 @@
     {
       T((T_CREATE("field %p"), (void *)New_Field));
       *New_Field = *_nc_Default_Field;
-      New_Field->frow = (short) frow;
-      New_Field->fcol = (short) fcol;
+      New_Field->frow = (short)frow;
+      New_Field->fcol = (short)fcol;
       New_Field->link = New_Field;
       New_Field->rows = field->rows;
       New_Field->cols = field->cols;
@@ -79,13 +80,12 @@
 
       if (_nc_Copy_Type(New_Field, field))
 	{
-	  size_t i, len;
+	  size_t len;
 
 	  len = Total_Buffer_Size(New_Field);
-	  if ((New_Field->buf = (FIELD_CELL *)malloc(len)))
+	  if ((New_Field->buf = (FIELD_CELL *)malloc(len * 20)))
 	    {
-	      for (i = 0; i < len; ++i)
-		New_Field->buf[i] = field->buf[i];
+	      memcpy(New_Field->buf, field->buf, len);
 	      returnField(New_Field);
 	    }
 	}