diff --git a/app/models/legacy/question.rb b/app/models/legacy/question.rb
index a1a39ca7..d96fd4f3 100644
--- a/app/models/legacy/question.rb
+++ b/app/models/legacy/question.rb
@@ -25,7 +25,7 @@ module Legacy
     scope :for_category, ->(category) { where(category:) }
     scope :created_in, ->(year) { where("extract(year from #{table_name}.created_at) = ?", year) }
 
-    enum target_group: %i[unknown for_students for_teachers for_parents]
+    enum :target_group, %i[unknown for_students for_teachers for_parents]
 
     def source
       target_group.gsub('for_', '')