diff --git a/app/helpers/ec_major_schools_helper.rb b/app/helpers/ec_major_schools_helper.rb
index 512e1cef..d4e34219 100644
--- a/app/helpers/ec_major_schools_helper.rb
+++ b/app/helpers/ec_major_schools_helper.rb
@@ -9,9 +9,9 @@ module EcMajorSchoolsHelper
 
     subitem_ids = ec_year.ec_graduation_subitems.reorder(nil).pluck(:id)
 
-    relations = EcGraduationRequirementCalculation.joins(ec_course_support: :ec_graduation_subitem_courses).where('ec_graduation_subitem_id in (?)', subitem_ids)
+    relations = EcGraduationRequirementCalculation.joins(ec_course_support: :ec_graduation_subitem_courses).where('ec_graduation_subitem_courses.ec_graduation_subitem_id in (?)', subitem_ids)
 
-    reached_map = relations.where(status: true).group('ec_graduation_subitem_id').count
+    reached_map = relations.where(status: true).group('ec_graduation_subitem_courses.ec_graduation_subitem_id').count
 
     reached_map.keys.size
   end