diff --git a/ncurses/base/lib_slkatron.c b/ncurses/base/lib_slkatron.c
new file mode 100644
index 0000000..90add86
--- /dev/null
+++ b/ncurses/base/lib_slkatron.c
@@ -0,0 +1,58 @@
+/****************************************************************************
+ * Copyright (c) 1998-2000,2005 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:  Juergen Pfeifer, 1997                                          *
+ *     and:  Thomas E. Dickey 2005                                          *
+ ****************************************************************************/
+
+/*
+ *	lib_slkatron.c
+ *	Soft key routines.
+ *      Switch on labels attributes
+ */
+#include <curses.priv.h>
+
+MODULE_ID("$Id: lib_slkatron.c,v 1.8 2005/01/08 23:02:01 tom Exp $")
+
+NCURSES_EXPORT(int)
+slk_attron(const chtype attr)
+{
+    T((T_CALLED("slk_attron(%s)"), _traceattr(attr)));
+
+    if (SP != 0 && SP->_slk != 0) {
+	TR(TRACE_ATTRS, ("... current %s", _tracech_t(CHREF(SP->_slk->attr))));
+	AddAttr(SP->_slk->attr, attr);
+	if ((attr & A_COLOR) != 0) {
+	    SetPair(SP->_slk->attr, PAIR_NUMBER(attr));
+	}
+	TR(TRACE_ATTRS, ("new attribute is %s", _tracech_t(CHREF(SP->_slk->attr))));
+	returnCode(OK);
+    } else
+	returnCode(ERR);
+}