diff --git a/ChangeLog b/ChangeLog
index d3132ad619..55b4843d67 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Feb 17 01:18:04 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* eval.c (rb_mod_s_constants): return its own constants for other
+	  than Module itself.  [ruby-core:59763] [Bug #9413]
+
 Mon Feb 17 01:16:00 2014  Eric Wong <e@80x24.org>
 
 	* ext/json/generator/depend: add build dependencies for json extension
diff --git a/eval.c b/eval.c
index 958daa8752..b5f41e6fcd 100644
--- a/eval.c
+++ b/eval.c
@@ -377,8 +377,8 @@ rb_mod_s_constants(int argc, VALUE *argv, VALUE mod)
     VALUE cbase = 0;
     void *data = 0;
 
-    if (argc > 0) {
-	return rb_mod_constants(argc, argv, rb_cModule);
+    if (argc > 0 || mod != rb_cModule) {
+	return rb_mod_constants(argc, argv, mod);
     }
 
     while (cref) {
diff --git a/test/ruby/test_module.rb b/test/ruby/test_module.rb
index 91fddabcd0..4bc725d2b5 100644
--- a/test/ruby/test_module.rb
+++ b/test/ruby/test_module.rb
@@ -777,6 +777,19 @@ class TestModule < Test::Unit::TestCase
     m.instance_eval { remove_const(:Foo) }
   end
 
+  class Bug9413
+    class << self
+      Foo = :foo
+    end
+  end
+
+  def test_singleton_constants
+    bug9413 = '[ruby-core:59763] [Bug #9413]'
+    c = Bug9413.singleton_class
+    assert_include(c.constants(true), :Foo, bug9413)
+    assert_include(c.constants(false), :Foo, bug9413)
+  end
+
   def test_frozen_class
     m = Module.new
     m.freeze
diff --git a/version.h b/version.h
index 101ac81d53..ec116411af 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.0.0"
 #define RUBY_RELEASE_DATE "2014-02-17"
-#define RUBY_PATCHLEVEL 428
+#define RUBY_PATCHLEVEL 429
 
 #define RUBY_RELEASE_YEAR 2014
 #define RUBY_RELEASE_MONTH 2