--- a/liboctave/oct-time.cc
+++ b/liboctave/oct-time.cc
@@ -47,11 +47,16 @@
 
 #if defined (HAVE_TM_ZONE)
   string s = tm.zone ();
-  t.tm_zone = s.c_str ();
+  char *ps = strsave (s.c_str ());
+  t.tm_zone = ps;
 #endif
 
   ot_unix_time = mktime (&t);
 
+#if defined (HAVE_TM_ZONE)
+  delete [] ps;
+#endif
+
   ot_usec = tm.usec ();
 }
 
@@ -138,7 +143,8 @@
   t.tm_isdst = tm_isdst;
 
 #if defined (HAVE_TM_ZONE)
-  t.tm_zone = tm_zone.c_str ();
+  char *ps = strsave (tm_zone.c_str ());
+  t.tm_zone = ps;
 #endif
 
   const char *fmt_str = fmt.c_str ();
@@ -158,6 +164,10 @@
       bufsize *= 2;
     }
 
+#if defined (HAVE_TM_ZONE)
+  delete [] ps;
+#endif
+
   retval = buf;
 
   delete [] buf;