diff --git a/lib/tasks/check_upgrade.rake b/lib/tasks/check_upgrade.rake
index 869f04e2..41cb8e0f 100644
--- a/lib/tasks/check_upgrade.rake
+++ b/lib/tasks/check_upgrade.rake
@@ -9,7 +9,7 @@ namespace :jsonapi do
     task :check_upgrade => :environment do
       Rails.application.eager_load!
 
-      resource_klasses = ObjectSpace.each_object(Class).select { |klass| klass.include?(JSONAPI::ResourceCommon)}
+      resource_klasses = ObjectSpace.each_object(Class).select { |klass| klass.included_modules.include?(JSONAPI::ResourceCommon)}
 
       puts "Checking #{resource_klasses.count} resources"