diff --git a/ChangeLog b/ChangeLog
index 158df4f231..0ce0521314 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,17 @@
+Wed Jul 13 14:22:50 2016  Koichi Sasada  <ko1@atdot.net>
+
+	* iseq.c (Init_ISeq): undef ISeq.translate and ISeq.load_iseq
+	  to prevent calling super classes' methods.
+
+	  Without this patch, you can write workaround like:
+
+	    class << RubyVM::InstructionSequence
+	      def translate; end
+	      undef translate
+	    end
+
+	* test/ruby/test_iseq.rb: add a test.
+
 Wed Jul 13 14:16:03 2016  Koichi Sasada  <ko1@atdot.net>
 
 	* vm_method.c (method_entry_get_without_cache): check
diff --git a/iseq.c b/iseq.c
index 28d35eb328..1c22fea74d 100644
--- a/iseq.c
+++ b/iseq.c
@@ -2462,4 +2462,7 @@ Init_ISeq(void)
     rb_define_singleton_method(rb_cISeq, "disasm", iseqw_s_disasm, 1);
     rb_define_singleton_method(rb_cISeq, "disassemble", iseqw_s_disasm, 1);
     rb_define_singleton_method(rb_cISeq, "of", iseqw_s_of, 1);
+
+    rb_undef_method(CLASS_OF(rb_cISeq), "translate");
+    rb_undef_method(CLASS_OF(rb_cISeq), "load_iseq");
 }
diff --git a/test/ruby/test_iseq.rb b/test/ruby/test_iseq.rb
index a71ad565f7..dba714aa62 100644
--- a/test/ruby/test_iseq.rb
+++ b/test/ruby/test_iseq.rb
@@ -235,4 +235,14 @@ class TestISeq < Test::Unit::TestCase
     end
     assert_equal([m1, e1.message], [m2, e2.message], feature11951)
   end
+
+  def test_translate_by_object
+    assert_separately([], <<-"end;")
+      class Object
+        def translate
+        end
+      end
+      assert_equal(0, eval("0"))
+    end;
+  end
 end