diff --git a/app/models/repository.rb b/app/models/repository.rb
index 00d80fb..df64e50 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -15,6 +15,8 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
+class ScmFetchError < Exception; end
+
 class Repository < ActiveRecord::Base
   include Redmine::Ciphering