diff --git a/lib/tasks/migrate_from_mantis.rake b/lib/tasks/migrate_from_mantis.rake
index 594a7ec0e..e9244fcaf 100644
--- a/lib/tasks/migrate_from_mantis.rake
+++ b/lib/tasks/migrate_from_mantis.rake
@@ -120,12 +120,8 @@ task :migrate_from_mantis => :environment do
       has_many :news, :class_name => "MantisNews", :foreign_key => :project_id
       has_many :members, :class_name => "MantisProjectUser", :foreign_key => :project_id
       
-      def name
-        read_attribute(:name)[0..29]
-      end
-      
       def identifier
-        read_attribute(:name).underscore[0..19].gsub(/[^a-z0-9\-]/, '-')
+        read_attribute(:name).gsub(/[^a-z0-9\-]+/, '-').slice(0, Project::IDENTIFIER_MAX_LENGTH)
       end
     end