diff --git a/ncurses/base/lib_scanw.c b/ncurses/base/lib_scanw.c
index 637aa46..1ed36a5 100644
--- a/ncurses/base/lib_scanw.c
+++ b/ncurses/base/lib_scanw.c
@@ -1,5 +1,6 @@
 /****************************************************************************
- * Copyright (c) 1998-2009,2011 Free Software Foundation, Inc.              *
+ * Copyright 2018-2019,2020 Thomas E. Dickey                                *
+ * Copyright 1998-2009,2011 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            *
@@ -40,21 +41,40 @@
 
 #include <curses.priv.h>
 
-MODULE_ID("$Id: lib_scanw.c,v 1.13 2011/10/22 16:31:35 tom Exp $")
+MODULE_ID("$Id: lib_scanw.c,v 1.19 2020/02/02 23:34:34 tom Exp $")
 
 NCURSES_EXPORT(int)
-vwscanw(WINDOW *win, NCURSES_CONST char *fmt, va_list argp)
+vwscanw(WINDOW *win, const char *fmt, va_list argp)
 {
     char buf[BUFSIZ];
+    int code = ERR;
 
-    if (wgetnstr(win, buf, (int) sizeof(buf) - 1) == ERR)
-	return (ERR);
+    if (wgetnstr(win, buf, (int) sizeof(buf) - 1) != ERR) {
+	if ((code = vsscanf(buf, fmt, argp)) == EOF) {
+	    code = ERR;
+	}
+    }
 
-    return (vsscanf(buf, fmt, argp));
+    return code;
 }
 
 NCURSES_EXPORT(int)
-scanw(NCURSES_CONST char *fmt,...)
+vw_scanw(WINDOW *win, const char *fmt, va_list argp)
+{
+    char buf[BUFSIZ];
+    int code = ERR;
+
+    if (wgetnstr(win, buf, (int) sizeof(buf) - 1) != ERR) {
+	if ((code = vsscanf(buf, fmt, argp)) == EOF) {
+	    code = ERR;
+	}
+    }
+
+    return code;
+}
+
+NCURSES_EXPORT(int)
+scanw(const char *fmt, ...)
 {
     int code;
     va_list ap;
@@ -62,13 +82,13 @@
     T(("scanw(\"%s\",...) called", fmt));
 
     va_start(ap, fmt);
-    code = vwscanw(stdscr, fmt, ap);
+    code = vw_scanw(stdscr, fmt, ap);
     va_end(ap);
     return (code);
 }
 
 NCURSES_EXPORT(int)
-wscanw(WINDOW *win, NCURSES_CONST char *fmt,...)
+wscanw(WINDOW *win, const char *fmt, ...)
 {
     int code;
     va_list ap;
@@ -76,31 +96,31 @@
     T(("wscanw(%p,\"%s\",...) called", (void *) win, fmt));
 
     va_start(ap, fmt);
-    code = vwscanw(win, fmt, ap);
+    code = vw_scanw(win, fmt, ap);
     va_end(ap);
     return (code);
 }
 
 NCURSES_EXPORT(int)
-mvscanw(int y, int x, NCURSES_CONST char *fmt,...)
+mvscanw(int y, int x, const char *fmt, ...)
 {
     int code;
     va_list ap;
 
     va_start(ap, fmt);
-    code = (move(y, x) == OK) ? vwscanw(stdscr, fmt, ap) : ERR;
+    code = (move(y, x) == OK) ? vw_scanw(stdscr, fmt, ap) : ERR;
     va_end(ap);
     return (code);
 }
 
 NCURSES_EXPORT(int)
-mvwscanw(WINDOW *win, int y, int x, NCURSES_CONST char *fmt,...)
+mvwscanw(WINDOW *win, int y, int x, const char *fmt, ...)
 {
     int code;
     va_list ap;
 
     va_start(ap, fmt);
-    code = (wmove(win, y, x) == OK) ? vwscanw(win, fmt, ap) : ERR;
+    code = (wmove(win, y, x) == OK) ? vw_scanw(win, fmt, ap) : ERR;
     va_end(ap);
     return (code);
 }