diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index 17481e1389..194fda7248 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,3 +1,7 @@
+*   Remove deprecated `Module#local_constant_names` in favor of `Module#local_constants`.
+
+    *Arun Agrawal*
+
 *   Remove deprecated `DateTime.local_offset` in favor of `DateTime.civil_from_fromat`.
 
     *Arun Agrawal*
diff --git a/activesupport/lib/active_support/core_ext/module/introspection.rb b/activesupport/lib/active_support/core_ext/module/introspection.rb
index 08e5f8a5c3..f1d26ef28f 100644
--- a/activesupport/lib/active_support/core_ext/module/introspection.rb
+++ b/activesupport/lib/active_support/core_ext/module/introspection.rb
@@ -59,20 +59,4 @@ class Module
   def local_constants #:nodoc:
     constants(false)
   end
-
-  # *DEPRECATED*: Use +local_constants+ instead.
-  #
-  # Returns the names of the constants defined locally as strings.
-  #
-  #   module M
-  #     X = 1
-  #   end
-  #   M.local_constant_names # => ["X"]
-  #
-  # This method is useful for forward compatibility, since Ruby 1.8 returns
-  # constant names as strings, whereas 1.9 returns them as symbols.
-  def local_constant_names
-    ActiveSupport::Deprecation.warn 'Module#local_constant_names is deprecated, use Module#local_constants instead'
-    local_constants.map { |c| c.to_s }
-  end
 end