diff --git a/ChangeLog b/ChangeLog
index 2e4e905ede..377a2db83b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Jan 21 22:57:18 2002  Nobuyoshi Nakada  <nobu.nakada@nifty.ne.jp>
+
+	* signal.c (ruby_signal): must define sighandler_t unless
+	  POSIX_SIGNAL.
+
 Mon Jan 21 08:25:30 2002  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* eval.c (ruby_stop): should not trace error handler.
diff --git a/signal.c b/signal.c
index 265e1fbf84..7d3b424725 100644
--- a/signal.c
+++ b/signal.c
@@ -281,9 +281,9 @@ rb_gc_mark_trap_list()
 #endif /* MACOS_UNUSE_SIGNAL */
 }
 
-#ifdef POSIX_SIGNAL
 typedef RETSIGTYPE (*sighandler_t)_((int));
 
+#ifdef POSIX_SIGNAL
 static sighandler_t
 ruby_signal(signum, handler)
     int signum;