diff --git a/activerecord/lib/active_record/calculations.rb b/activerecord/lib/active_record/calculations.rb
index 2ca1a0aaa3b15..246f87b7a9b90 100644
--- a/activerecord/lib/active_record/calculations.rb
+++ b/activerecord/lib/active_record/calculations.rb
@@ -211,7 +211,7 @@ def construct_calculation_sql(operation, column_name, options) #:nodoc:
 
           sql << " ORDER BY #{options[:order]} "       if options[:order]
           add_limit!(sql, options, scope)
-          sql << ')' if use_workaround
+          sql << ') AS #{aggregate_alias}_subquery' if use_workaround
           sql
         end