diff --git a/activerecord/lib/active_record/aggregations.rb b/activerecord/lib/active_record/aggregations.rb
index e5e89734d2..30826c9ffa 100644
--- a/activerecord/lib/active_record/aggregations.rb
+++ b/activerecord/lib/active_record/aggregations.rb
@@ -212,8 +212,7 @@ module ActiveRecord
         #
         # Option examples:
         #   composed_of :temperature, mapping: %w(reading celsius)
-        #   composed_of :balance, class_name: "Money", mapping: %w(balance amount),
-        #                         converter: Proc.new { |balance| balance.to_money }
+        #   composed_of :balance, class_name: "Money", mapping: %w(balance amount)
         #   composed_of :address, mapping: [ %w(address_street street), %w(address_city city) ]
         #   composed_of :gps_location
         #   composed_of :gps_location, allow_nil: true
diff --git a/activerecord/test/models/customer.rb b/activerecord/test/models/customer.rb
index 524a9d7bd9..bc501a5ce0 100644
--- a/activerecord/test/models/customer.rb
+++ b/activerecord/test/models/customer.rb
@@ -4,7 +4,7 @@ class Customer < ActiveRecord::Base
   cattr_accessor :gps_conversion_was_run
 
   composed_of :address, mapping: [ %w(address_street street), %w(address_city city), %w(address_country country) ], allow_nil: true
-  composed_of :balance, class_name: "Money", mapping: %w(balance amount), converter: Proc.new(&:to_money)
+  composed_of :balance, class_name: "Money", mapping: %w(balance amount)
   composed_of :gps_location, allow_nil: true
   composed_of :non_blank_gps_location, class_name: "GpsLocation", allow_nil: true, mapping: %w(gps_location gps_location),
               converter: lambda { |gps| self.gps_conversion_was_run = true; gps.blank? ? nil : GpsLocation.new(gps) }