diff --git a/lib/second_level_cache.rb b/lib/second_level_cache.rb
index 989ebc8..c069c70 100644
--- a/lib/second_level_cache.rb
+++ b/lib/second_level_cache.rb
@@ -26,7 +26,11 @@ def acts_as_cached(options = {})
       end
 
       def second_level_cache_enabled?
-        !!@second_level_cache_enabled
+        if defined?(Rails)
+          !!@second_level_cache_enabled && ::Rails.application.config.cache_classes
+        else
+          !!@second_level_cache_enabled
+        end
       end
 
       def without_second_level_cache
diff --git a/lib/second_level_cache/active_record/has_one_association.rb b/lib/second_level_cache/active_record/has_one_association.rb
index 211a438..34c1742 100644
--- a/lib/second_level_cache/active_record/has_one_association.rb
+++ b/lib/second_level_cache/active_record/has_one_association.rb
@@ -12,6 +12,7 @@ module HasOneAssociation
 
         def find_target_with_second_level_cache
           return find_target_without_second_level_cache unless association_class.second_level_cache_enabled?
+          return find_target_without_second_level_cache if self.class == ::ActiveRecord::Associations::HasOneThroughAssociation
           cache_record = association_class.fetch_by_uniq_key(owner[reflection.active_record_primary_key], reflection.foreign_key)
           return cache_record.tap{|record| set_inverse_instance(record)} if cache_record