diff --git a/ChangeLog b/ChangeLog
index 49f92108eb..9a44355501 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Jul 10 13:58:08 2006  Hidetoshi NAGAI  <nagai@ai.kyutech.ac.jp>
+
+	* signal.c (install_nativethread_sighandler): commented out.
+
 Mon Jul 10 09:29:12 2006  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* eval.c (rb_clear_cache_for_remove): clear entries for included
diff --git a/signal.c b/signal.c
index 6441c0a8cf..8e76090487 100644
--- a/signal.c
+++ b/signal.c
@@ -819,6 +819,13 @@ install_sighandler(int signum, sighandler_t handler)
     }
 }
 
+#if 0
+/* 
+ *   If you write a handler which works on any native thread
+ *   (even if the thread is NOT a ruby's one), please enable
+ *   this function and use it to install the handler, instead
+ *   of `install_sighandler()'.
+ */
 #ifdef HAVE_NATIVETHREAD
 static void
 install_nativethread_sighandler(int signum, sighandler_t handler)
@@ -837,6 +844,7 @@ install_nativethread_sighandler(int signum, sighandler_t handler)
     }
 }
 #endif
+#endif
 
 static void
 init_sigchld(int sig)