diff --git a/activesupport/lib/active_support/deprecation.rb b/activesupport/lib/active_support/deprecation.rb
index d20151661b9c4..540be29bf34ff 100644
--- a/activesupport/lib/active_support/deprecation.rb
+++ b/activesupport/lib/active_support/deprecation.rb
@@ -90,15 +90,15 @@ def deprecate(*method_names)
         method_names.each do |method_name|
           alias_method_chain(method_name, :deprecation) do |target, punctuation|
             class_eval(<<-EOS, __FILE__, __LINE__)
-              def #{target}_with_deprecation#{punctuation}(*args, &block)   # def generate_secret_with_deprecation(*args, &block)
-                ::ActiveSupport::Deprecation.warn(                          #   ::ActiveSupport::Deprecation.warn(
-                  self.class.deprecated_method_warning(                     #     self.class.deprecated_method_warning(
-                    :#{method_name},                                        #       :generate_secret,
-                    #{options[method_name].inspect}),                       #       "You should use ActiveSupport::SecureRandom.hex(64)"),
-                  caller                                                    #     caller
-                )                                                           #   )
-                #{target}_without_deprecation#{punctuation}(*args, &block)  #   generate_secret_without_deprecation(*args, &block)
-              end                                                           # end
+              def #{target}_with_deprecation#{punctuation}(*args, &block)          # def generate_secret_with_deprecation(*args, &block)
+                ::ActiveSupport::Deprecation.warn(                                 #   ::ActiveSupport::Deprecation.warn(
+                  self.class.deprecated_method_warning(                            #     self.class.deprecated_method_warning(
+                    :#{method_name},                                               #       :generate_secret,
+                    #{options[method_name].inspect}),                              #       "You should use ActiveSupport::SecureRandom.hex(64)"),
+                  caller                                                           #     caller
+                )                                                                  #   )
+                send(:#{target}_without_deprecation#{punctuation}, *args, &block)  #   send(:generate_secret_without_deprecation, *args, &block)
+              end                                                                  # end
             EOS
           end
         end
diff --git a/activesupport/test/deprecation_test.rb b/activesupport/test/deprecation_test.rb
index 73a1f9959cec7..a3ae39d07179a 100644
--- a/activesupport/test/deprecation_test.rb
+++ b/activesupport/test/deprecation_test.rb
@@ -25,6 +25,9 @@ def d; end
   def e; end
   deprecate :a, :b, :c => :e, :d => "you now need to do something extra for this one"
 
+  def f=(v); end
+  deprecate :f=
+
   module B
     C = 1
   end
@@ -133,6 +136,7 @@ def test_silence
   def test_deprecation_without_explanation
     assert_deprecated { @dtc.a }
     assert_deprecated { @dtc.b }
+    assert_deprecated { @dtc.f = :foo }
   end
 
   def test_deprecation_with_alternate_method