diff --git a/activerecord/lib/active_record/fixtures.rb b/activerecord/lib/active_record/fixtures.rb
index c59c00f424..860e7ea0e4 100644
--- a/activerecord/lib/active_record/fixtures.rb
+++ b/activerecord/lib/active_record/fixtures.rb
@@ -789,6 +789,7 @@ module ActiveRecord
         fixture_names = Array.wrap(fixture_names || fixture_table_names)
         methods = Module.new do
           fixture_names.each do |fixture_name|
+            fixture_name = fixture_name.to_s
             accessor_name = fixture_name.tr('/', '_').to_sym
 
             define_method(accessor_name) do |*fixtures|
diff --git a/activerecord/test/cases/fixtures_test.rb b/activerecord/test/cases/fixtures_test.rb
index 859bb7992b..0e83621c98 100644
--- a/activerecord/test/cases/fixtures_test.rb
+++ b/activerecord/test/cases/fixtures_test.rb
@@ -589,7 +589,7 @@ class FasterFixturesTest < ActiveRecord::TestCase
 
     load_extra_fixture('posts')
     assert ActiveRecord::Fixtures.fixture_is_cached?(ActiveRecord::Base.connection, 'posts')
-    self.class.setup_fixture_accessors('posts')
+    self.class.setup_fixture_accessors :posts
     assert_equal 'Welcome to the weblog', posts(:welcome).title
   end
 end