2 files changed, 8 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/reflection.rb b/activerecord/lib/active_record/reflection.rb
index 4f53280b5c..1026e20f79 100644
--- a/activerecord/lib/active_record/reflection.rb
+++ b/activerecord/lib/active_record/reflection.rb
@@ -219,8 +219,10 @@ module ActiveRecord
       end
 
       def klass_join_scope(table, predicate_builder) # :nodoc:
-        if klass.current_scope && klass.current_scope.values.empty?
-          klass.unscoped
+        current_scope = klass.current_scope
+
+        if current_scope && current_scope.empty_scope?
+          build_scope(table, predicate_builder)
         else
           klass.default_scoped(build_scope(table, predicate_builder))
         end
diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb
index c5d98e970a..d9e1e5c39c 100644
--- a/activerecord/lib/active_record/relation.rb
+++ b/activerecord/lib/active_record/relation.rb
@@ -642,6 +642,10 @@ module ActiveRecord
       "#<#{self.class.name} [#{entries.join(', ')}]>"
     end
 
+    def empty_scope? # :nodoc:
+      @values == klass.unscoped.values
+    end
+
     protected
 
       def load_records(records)