diff --git a/activesupport/lib/active_support/core_ext/object/to_param.rb b/activesupport/lib/active_support/core_ext/object/to_param.rb
index a5e2260791b198a08254975b523b4c1a7adcbca9..7ca763cbade9de6ac0ee08e8d8eee26ba7c25e41 100644
--- a/activesupport/lib/active_support/core_ext/object/to_param.rb
+++ b/activesupport/lib/active_support/core_ext/object/to_param.rb
@@ -38,7 +38,7 @@ class Hash
   # ==== Examples
   #   { :name => 'David', :nationality => 'Danish' }.to_query # => "name=David&nationality=Danish"
   #
-  #   { :name => 'David', :nationality => 'Danish' }.to_query('user') # => "user%5Bname%5D=David&user%5Bnationality%5D=Danish"
+  #   { :name => 'David', :nationality => 'Danish' }.to_query('user') # => "user[name]=David&user[nationality]=Danish"
   def to_param(namespace = nil)
     collect do |key, value|
       value.to_query(namespace ? "#{namespace}[#{key}]" : key)
diff --git a/activesupport/lib/active_support/core_ext/object/to_query.rb b/activesupport/lib/active_support/core_ext/object/to_query.rb
index 3f1540f685959268024bad131f28834aca6030e9..1c6a02c9adccfa394f3275b754993383d6084e80 100644
--- a/activesupport/lib/active_support/core_ext/object/to_query.rb
+++ b/activesupport/lib/active_support/core_ext/object/to_query.rb
@@ -15,7 +15,7 @@ class Array
   # Converts an array into a string suitable for use as a URL query string,
   # using the given +key+ as the param name.
   #
-  #   ['Rails', 'coding'].to_query('hobbies') # => "hobbies%5B%5D=Rails&hobbies%5B%5D=coding"
+  #   ['Rails', 'coding'].to_query('hobbies') # => "hobbies[]=Rails&hobbies[]=coding"
   def to_query(key)
     prefix = "#{key}[]"
     collect { |value| value.to_query(prefix) }.join '&'
diff --git a/activesupport/test/core_ext/object/to_query_test.rb b/activesupport/test/core_ext/object/to_query_test.rb
index 0fb15be654ddacc2667681bf9ef05cacf8403382..4d655913cc8500962e37483d8bce237628bdd85e 100644
--- a/activesupport/test/core_ext/object/to_query_test.rb
+++ b/activesupport/test/core_ext/object/to_query_test.rb
@@ -17,22 +17,22 @@ def empty.to_param; nil end
   end
 
   def test_nested_conversion
-    assert_query_equal 'person%5Blogin%5D=seckar&person%5Bname%5D=Nicholas',
+    assert_query_equal 'person[login]=seckar&person[name]=Nicholas',
       :person => {:name => 'Nicholas', :login => 'seckar'}
   end
 
   def test_multiple_nested
-    assert_query_equal 'account%5Bperson%5D%5Bid%5D=20&person%5Bid%5D=10',
+    assert_query_equal 'account[person][id]=20&person[id]=10',
       :person => {:id => 10}, :account => {:person => {:id => 20}}
   end
 
   def test_array_values
-    assert_query_equal 'person%5Bid%5D%5B%5D=10&person%5Bid%5D%5B%5D=20',
+    assert_query_equal 'person[id][]=10&person[id][]=20',
       :person => {:id => [10, 20]}
   end
 
   def test_array_values_are_not_sorted
-    assert_query_equal 'person%5Bid%5D%5B%5D=20&person%5Bid%5D%5B%5D=10',
+    assert_query_equal 'person[id][]=20&person[id][]=10',
       :person => {:id => [20, 10]}
   end