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diff --git a/macos/source/mactime.h b/macos/source/mactime.h
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+/*
+  Copyright (c) 1990-2000 Info-ZIP.  All rights reserved.
+
+  See the accompanying file LICENSE, version 2000-Apr-09 or later
+  (the contents of which are also included in zip.h) for terms of use.
+  If, for some reason, all these files are missing, the Info-ZIP license
+  also may be found at:  ftp://ftp.info-zip.org/pub/infozip/license.html
+*/
+#ifndef _MACTIME_H_
+#define _MACTIME_H_
+/* -----------------------------------------------------------------------------
+
+The original functions (Metrowerks Codewarrior pro 3.0) gmtime, localtime,
+mktime and time do not work correctly. The supplied link library mactime.c
+contains replacement functions for them.
+
+ *     Caveat: On a Mac, we only know the GMT and DST offsets for
+ *     the current time, not for the time in question.
+ *     Mac has no support for DST handling.
+ *     DST changeover is all manually set by the user.
+
+
+------------------------------------------------------------------------------*/
+
+#include <time.h>
+#include <mactypes.h>
+
+/*****************************************************************************/
+/*  Macros, typedefs                                                         */
+/*****************************************************************************/
+
+
+  /*
+   * ARGH.  Mac times are based on 1904 Jan 1 00:00, not 1970 Jan 1 00:00.
+   *  So we have to diddle time_t's appropriately:  add or subtract 66 years'
+   *  worth of seconds == number of days times 86400 == (66*365 regular days +
+   *  17 leap days ) * 86400 == (24090 + 17) * 86400 == 2082844800L seconds.
+   *  We hope time_t is an unsigned long (ulg) on the Macintosh...
+   */
+/*
+This Offset is only used by MacFileDate_to_UTime()
+*/
+
+#define MACOS_TO_UNIX(x)  (x) -= (unsigned long)MacOS_2_Unix
+#define UNIX_TO_MACOS(x)  (x) += (unsigned long)MacOS_2_Unix
+
+/*
+The MacOS function GetDateTime returns  the
+number of seconds elapsed since midnight, January 1, 1904.
+*/
+extern const unsigned long MacOS_2_Unix;
+
+
+/* prototypes for public utility functions */
+time_t MacFtime2UnixFtime(unsigned long macftime);
+unsigned long UnixFtime2MacFtime(time_t unxftime);
+time_t  AdjustForTZmoveMac(unsigned long macloctim, long s_gmtoffs);
+Boolean GetGMToffsetMac(unsigned long macftime, long *UTCoffset);
+
+
+#endif