diff --git a/loslib.c b/loslib.c
index 6baebd91..95ec7395 100644
--- a/loslib.c
+++ b/loslib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: loslib.c,v 1.30 2010/07/02 11:38:13 roberto Exp roberto $
+** $Id: loslib.c,v 1.31 2010/07/02 12:01:53 roberto Exp roberto $
 ** Standard Operating System library
 ** See Copyright Notice in lua.h
 */
@@ -276,7 +276,11 @@ static int os_setlocale (lua_State *L) {
 
 
 static int os_exit (lua_State *L) {
-  int status = luaL_optint(L, 1, EXIT_SUCCESS);
+  int status;
+  if (lua_isboolean(L, 1))
+    status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE);
+  else
+    status = luaL_optint(L, 1, EXIT_SUCCESS);
   if (lua_toboolean(L, 2))
     lua_close(L);
   exit(status);