diff --git a/lib/redmine_dmsf/patches/issue_patch.rb b/lib/redmine_dmsf/patches/issue_patch.rb
index 78845102..757de55f 100644
--- a/lib/redmine_dmsf/patches/issue_patch.rb
+++ b/lib/redmine_dmsf/patches/issue_patch.rb
@@ -106,7 +106,7 @@ module RedmineDmsf
             parent.save
           end
           if parent
-            folder = DmsfFolder.system.where(['project_id = ? AND dmsf_folder_id = ? AND CAST(title AS DECIMAL) = ?',
+            folder = DmsfFolder.system.where(["project_id = ? AND dmsf_folder_id = ? AND title LIKE '? - %'",
               self.project_id, parent.id, self.id]).first
             if create && !folder
               folder = DmsfFolder.new