diff --git a/ChangeLog b/ChangeLog
index 984b11f878..693f64bab4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -6,6 +6,11 @@ Tue Oct 17 22:03:08 2006  Minero Aoki  <aamine@loveruby.net>
 
 	* lib/erb.rb: String#each was removed, use #each_line instead.
 
+Tue Oct 17 12:27:32 2006  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* array.c (ary_shared_array): should set NOEMBED flag for a copied
+	  array.
+
 Tue Oct 17 08:04:31 2006  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* string.c (rb_str_lines): now takes optional argument for the
diff --git a/array.c b/array.c
index 166868452f..458310a69b 100644
--- a/array.c
+++ b/array.c
@@ -486,6 +486,7 @@ ary_shared_array(VALUE klass, VALUE ary)
     VALUE val = ary_alloc(klass);
 
     ary_make_shared(ary);
+    ARY_SET_NOEMBED(val);
     RARRAY(val)->as.heap.ptr = RARRAY(ary)->as.heap.ptr;
     RARRAY(val)->as.heap.len = RARRAY(ary)->as.heap.len;
     RARRAY(val)->as.heap.aux.shared = RARRAY(ary)->as.heap.aux.shared;