diff --git a/activesupport/lib/active_support/hash_with_indifferent_access.rb b/activesupport/lib/active_support/hash_with_indifferent_access.rb
index e8215bc566..c406dd3c2e 100644
--- a/activesupport/lib/active_support/hash_with_indifferent_access.rb
+++ b/activesupport/lib/active_support/hash_with_indifferent_access.rb
@@ -45,6 +45,8 @@ module ActiveSupport
       regular_writer(convert_key(key), convert_value(value))
     end
 
+    alias_method :store, :[]=
+
     # Updates the instantized hash with values from the second:
     #
     #   hash_1 = HashWithIndifferentAccess.new
diff --git a/activesupport/test/core_ext/hash_ext_test.rb b/activesupport/test/core_ext/hash_ext_test.rb
index 0f35eb9e78..545fed2684 100644
--- a/activesupport/test/core_ext/hash_ext_test.rb
+++ b/activesupport/test/core_ext/hash_ext_test.rb
@@ -316,6 +316,16 @@ class HashExtTest < Test::Unit::TestCase
     assert_equal expected, hash_1
   end
 
+  def test_store_on_indifferent_access
+    hash = HashWithIndifferentAccess.new
+    hash.store(:test1, 1)
+    hash.store('test1', 11)
+    hash[:test2] = 2
+    hash['test2'] = 22
+    expected = { "test1" => 11, "test2" => 22 }
+    assert_equal expected, hash
+  end
+
   def test_reverse_merge
     defaults = { :a => "x", :b => "y", :c => 10 }.freeze
     options  = { :a => 1, :b => 2 }