diff --git a/ChangeLog b/ChangeLog
index 085be0630b..805d78f2bd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Mon May 19 13:23:03 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* process.c (rb_spawn_internal): set last_status when status == -1
+	  because there is no path to set it on win32. this patch is derived
+	  from [ruby-core:16787], submitted by Luis Lavena <luislavena at
+	  gmail.com>
+
 Mon May 19 11:32:47 2008  Koichi Sasada  <ko1@atdot.net>
 
 	* vm.c, insns.def, eval.c, vm_insnhelper.c: fix CREF handling.
diff --git a/process.c b/process.c
index b5be40372d..682ba259bc 100644
--- a/process.c
+++ b/process.c
@@ -2674,6 +2674,10 @@ rb_spawn_internal(int argc, VALUE *argv, int default_close_others)
     else {
 	status = proc_spawn_n(argc, argv, prog);
     }
+#  if defined(_WIN32)
+    if (status == -1)
+	rb_last_status_set(0x7f << 8, 0);
+#  endif
 # else
     if (argc) prog = rb_ary_join(rb_ary_new4(argc, argv), rb_str_new2(" "));
     status = system(StringValuePtr(prog));