diff --git a/ncurses/base/lib_wattron.c b/ncurses/base/lib_wattron.c
new file mode 100644
index 0000000..2e17d96
--- /dev/null
+++ b/ncurses/base/lib_wattron.c
@@ -0,0 +1,64 @@
+/****************************************************************************
+ * Copyright (c) 1998-2005,2006 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            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
+ *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
+ *     and: Thomas E. Dickey                        1996-on                 *
+ ****************************************************************************/
+
+/*
+**	lib_wattron.c
+**
+**	The routines wattr_on().
+**
+*/
+
+#include <curses.priv.h>
+#include <ctype.h>
+
+MODULE_ID("$Id: lib_wattron.c,v 1.9 2006/05/27 19:30:46 tom Exp $")
+
+NCURSES_EXPORT(int)
+wattr_on(WINDOW *win, attr_t at, void *opts GCC_UNUSED)
+{
+    T((T_CALLED("wattr_on(%p,%s)"), win, _traceattr(at)));
+    if (win != 0) {
+	T(("... current %s (%d)",
+	   _traceattr(WINDOW_ATTRS(win)),
+	   GET_WINDOW_PAIR(win)));
+
+	if_EXT_COLORS({
+	    if (at & A_COLOR)
+		win->_color = PAIR_NUMBER(at);
+	});
+	toggle_attr_on(WINDOW_ATTRS(win), at);
+	returnCode(OK);
+    } else
+	returnCode(ERR);
+}