diff --git a/ncurses/base/lib_slkatron.c b/ncurses/base/lib_slkatron.c
index 90add86..bc2fb33 100644
--- a/ncurses/base/lib_slkatron.c
+++ b/ncurses/base/lib_slkatron.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 1998-2000,2005 Free Software Foundation, Inc.              *
+ * Copyright (c) 1998-2009,2010 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            *
@@ -38,21 +38,29 @@
  */
 #include <curses.priv.h>
 
-MODULE_ID("$Id: lib_slkatron.c,v 1.8 2005/01/08 23:02:01 tom Exp $")
+MODULE_ID("$Id: lib_slkatron.c,v 1.12 2010/03/31 23:38:02 tom Exp $")
 
 NCURSES_EXPORT(int)
-slk_attron(const chtype attr)
+NCURSES_SP_NAME(slk_attron) (NCURSES_SP_DCLx const chtype attr)
 {
-    T((T_CALLED("slk_attron(%s)"), _traceattr(attr)));
+    T((T_CALLED("slk_attron(%p,%s)"), (void *) SP_PARM, _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 (SP_PARM != 0 && SP_PARM->_slk != 0) {
+	TR(TRACE_ATTRS, ("... current %s", _tracech_t(CHREF(SP_PARM->_slk->attr))));
+	AddAttr(SP_PARM->_slk->attr, attr);
 	if ((attr & A_COLOR) != 0) {
-	    SetPair(SP->_slk->attr, PAIR_NUMBER(attr));
+	    SetPair(SP_PARM->_slk->attr, PairNumber(attr));
 	}
-	TR(TRACE_ATTRS, ("new attribute is %s", _tracech_t(CHREF(SP->_slk->attr))));
+	TR(TRACE_ATTRS, ("new attribute is %s", _tracech_t(CHREF(SP_PARM->_slk->attr))));
 	returnCode(OK);
     } else
 	returnCode(ERR);
 }
+
+#if NCURSES_SP_FUNCS
+NCURSES_EXPORT(int)
+slk_attron(const chtype attr)
+{
+    return NCURSES_SP_NAME(slk_attron) (CURRENT_SCREEN, attr);
+}
+#endif