diff --git a/app/models/issue.rb b/app/models/issue.rb
index 3e19882..2111b04 100644
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -1104,7 +1104,7 @@ class Issue < ActiveRecord::Base
 
   # Returns a scope of the given issues and their descendants
   def self.self_and_descendants(issues)
-    issue_ids = Issue.joins("JOIN #{Issue.table_name} ancestors" +
+    Issue.joins("JOIN #{Issue.table_name} ancestors" +
         " ON ancestors.root_id = #{Issue.table_name}.root_id" +
         " AND ancestors.lft <= #{Issue.table_name}.lft AND ancestors.rgt >= #{Issue.table_name}.rgt"
       ).