diff --git a/include/nc_mingw.h b/include/nc_mingw.h
index 3247003..1bfc4b0 100644
--- a/include/nc_mingw.h
+++ b/include/nc_mingw.h
@@ -1,5 +1,6 @@
 /****************************************************************************
- * Copyright (c) 2008-2009,2010 Free Software Foundation, Inc.              *
+ * Copyright 2018-2020,2023 Thomas E. Dickey                                *
+ * Copyright 2008-2010,2017 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            *
@@ -27,19 +28,20 @@
  ****************************************************************************/
 
 /****************************************************************************
- * Author: Thomas Dickey, 2008-on                                           * 
- *                                                                          *
+ * Author: Thomas Dickey, 2008-on                                           *
  ****************************************************************************/
 
-/* $Id: nc_mingw.h,v 1.3 2010/09/25 22:16:12 juergen Exp $ */
+/* $Id: nc_mingw.h,v 1.10 2023/02/25 19:59:24 tom Exp $ */
 
 #ifndef NC_MINGW_H
 #define NC_MINGW_H 1
 
+#ifdef _WIN32
+
 #ifdef WINVER
 #  if WINVER < 0x0501
 #    error WINVER must at least be 0x0501
-#  endif  
+#  endif
 #else
 #  define WINVER 0x0501
 #endif
@@ -48,22 +50,39 @@
 #undef sleep
 #define sleep(n) Sleep((n) * 1000)
 
-#undef gettimeofday
-#define gettimeofday(tv,tz) _nc_gettimeofday(tv,tz)
+#if HAVE_SYS_TIME_H
+#include <sys/time.h>		/* for struct timeval */
+#endif
 
-#include <sys/time.h>	/* for struct timeval */
+#ifdef _MSC_VER
+#include <winsock2.h>		/* for struct timeval */
+#endif
 
-extern int _nc_gettimeofday(struct timeval *, void *);
+#ifdef __cplusplus
+extern "C" {
+#endif
 
+#include <ncurses_dll.h>
+
+#if !HAVE_CLOCK_GETTIME && !HAVE_GETTIMEOFDAY
+NCURSES_EXPORT(int) _nc_gettimeofday(struct timeval *, void *);
 #undef HAVE_GETTIMEOFDAY
-#define HAVE_GETTIMEOFDAY 1
+#define HAVE_GETTIMEOFDAY 2
+#define gettimeofday(tv,tz) _nc_gettimeofday(tv,tz)
+#endif
 
 #define SIGHUP  1
 #define SIGKILL 9
 #define getlogin() "username"
 
 #undef wcwidth
-#define wcwidth(ucs) _nc_wcwidth(ucs)
-extern int _nc_wcwidth(wchar_t);
+#define wcwidth(ucs) _nc_wcwidth((wchar_t)(ucs))
+NCURSES_EXPORT(int) _nc_wcwidth(wchar_t);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _WIN32 */
 
 #endif /* NC_MINGW_H */