diff --git a/activerecord/lib/active_record/named_scope.rb b/activerecord/lib/active_record/named_scope.rb
index 26701548c2..c99c4beca9 100644
--- a/activerecord/lib/active_record/named_scope.rb
+++ b/activerecord/lib/active_record/named_scope.rb
@@ -140,8 +140,8 @@ module ActiveRecord
         @found ? @found.empty? : count.zero?
       end
 
-      def respond_to?(method)
-        super || @proxy_scope.respond_to?(method)
+      def respond_to?(method, include_private = false)
+        super || @proxy_scope.respond_to?(method, include_private)
       end
 
       def any?
diff --git a/activerecord/test/cases/named_scope_test.rb b/activerecord/test/cases/named_scope_test.rb
index db31ddb293..6f6ea1cbe9 100644
--- a/activerecord/test/cases/named_scope_test.rb
+++ b/activerecord/test/cases/named_scope_test.rb
@@ -52,6 +52,11 @@ class NamedScopeTest < ActiveRecord::TestCase
     assert Topic.approved.respond_to?(:length)
   end
 
+  def test_respond_to_respects_include_private_parameter
+    assert !Topic.approved.respond_to?(:load_found)
+    assert Topic.approved.respond_to?(:load_found, true)
+  end
+
   def test_subclasses_inherit_scopes
     assert Topic.scopes.include?(:base)