diff --git a/configure.ac b/configure.ac
index 51574e94..af061ae5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,7 +15,7 @@ dnl along with this program; if not, write to the Free Software
 dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 dnl 02111-1307, USA.
 
-AC_REVISION([$Id: configure.ac,v 1.43 2003/09/19 04:39:50 rocky Exp $])dnl
+AC_REVISION([$Id: configure.ac,v 1.44 2003/09/21 07:43:39 rocky Exp $])dnl
 AC_INIT(lib/cdio.c)
 AM_CONFIG_HEADER(config.h)
 AM_INIT_AUTOMAKE(libcdio, 0.64-cvs)
@@ -257,6 +257,12 @@ AC_SUBST(HAVE_DARWIN_CDROM)
 
 AC_CHECK_FUNCS( bzero memcpy )
 
+AC_CHECK_MEMBER([struct tm.tm_gmtoff],
+                [AC_DEFINE(HAVE_TM_GMTOFF, 1,
+                        [Define if struct tm has the tm_gmtoff member.])],
+                 ,
+                 [#include <time.h>])
+
 if test x$enable_cddb = x; then
 AC_ARG_ENABLE(cddb,
 	[  --disable-cddb          don't include CDDB lookups in cd_info],
diff --git a/lib/iso9660.c b/lib/iso9660.c
index 18cc4100..28140712 100644
--- a/lib/iso9660.c
+++ b/lib/iso9660.c
@@ -1,5 +1,5 @@
 /*
-    $Id: iso9660.c,v 1.14 2003/09/21 01:14:30 rocky Exp $
+    $Id: iso9660.c,v 1.15 2003/09/21 07:43:39 rocky Exp $
 
     Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>
     Copyright (C) 2003 Rocky Bernstein <rocky@panix.com>
@@ -37,7 +37,7 @@
 #include <stdio.h>
 #endif
 
-static const char _rcsid[] = "$Id: iso9660.c,v 1.14 2003/09/21 01:14:30 rocky Exp $";
+static const char _rcsid[] = "$Id: iso9660.c,v 1.15 2003/09/21 07:43:39 rocky Exp $";
 
 /* some parameters... */
 #define SYSTEM_ID         "CD-RTOS CD-BRIDGE"
@@ -99,6 +99,7 @@ iso9660_set_dtime (const struct tm *tm, /*out*/ iso9660_dtime_t *idr_date)
   idr_date->dt_minute = tm->tm_min;
   idr_date->dt_second = tm->tm_sec;
 
+#ifdef HAVE_TM_GMTOFF
   /* The ISO 9660 timezone is in the range -48..+52 and each unit
      represents a 15-minute interval. */
   idr_date->dt_gmtoff = tm->tm_gmtoff / (15 * 60);
@@ -115,6 +116,9 @@ iso9660_set_dtime (const struct tm *tm, /*out*/ iso9660_dtime_t *idr_date)
                idr_date->dt_gmtoff);
     idr_date->dt_gmtoff = 52;
   }
+#else 
+  idr_date->dt_gmtoff = 0;
+#endif
 }
 
 /*!