diff --git a/ChangeLog b/ChangeLog
index dff39dd50f..18a1547934 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Feb  9 14:42:28 2005  URABE Shyouhei  <shyouhei@ice.uec.ac.jp>
+
+	* eval.c (scope_dup): add volatile not to optimize tbl.
+
 Wed Feb  9 10:02:02 2005  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* ext/tk/make-tkutil, ext/tk/tkutil/subconf.rb: no longer used.
diff --git a/eval.c b/eval.c
index 2bb66cd8d8..06232b014f 100644
--- a/eval.c
+++ b/eval.c
@@ -7744,7 +7744,7 @@ static void
 scope_dup(scope)
     struct SCOPE *scope;
 {
-    ID *tbl;
+    volatile ID *tbl;
     VALUE *vars;
 
     scope->flags |= SCOPE_DONT_RECYCLE;