diff --git a/ChangeLog b/ChangeLog
index 32d5cbe740..5490e5eb55 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,6 +4,8 @@ Tue Nov 30 14:58:33 2004  WATANABE Hirofumi  <eban@ruby-lang.org>
 
 Tue Nov 30 00:49:08 2004  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
+	* eval.c (PUSH_FRAME): flags should have been initialized.
+
 	* eval.c (rb_eval): [ruby-core:03856]
 
 	* io.c (rb_io_sysread): use temporary lock.  [ruby-dev:24992]
diff --git a/eval.c b/eval.c
index c718e79b6e..1d2f424cf6 100644
--- a/eval.c
+++ b/eval.c
@@ -663,6 +663,7 @@ static unsigned long frame_unique = 0;
     _frame.node = ruby_current_node;	\
     _frame.iter = ruby_iter->iter;	\
     _frame.argc = 0;			\
+    _frame.flags = 0;			\
     _frame.uniq = frame_unique++;	\
     ruby_frame = &_frame