diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 08141a2..d719ed9 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -748,7 +748,7 @@ module ApplicationHelper
           when 'commit', 'source', 'export'
             if project
               repository = nil
-              if name =~ %r{^(([a-z0-9\-]+)\|)(.+)$}
+              if name =~ %r{^(([a-z0-9\-\_]+)\|)(.+)$}
                 repo_prefix, repo_identifier, name = $1, $2, $3
                 repository = project.repositories.detect {|repo| repo.identifier == repo_identifier}
               else