diff --git a/app/helpers/projects_helper.rb b/app/helpers/projects_helper.rb
index 5d51e707..912482f1 100644
--- a/app/helpers/projects_helper.rb
+++ b/app/helpers/projects_helper.rb
@@ -30,7 +30,7 @@ module ProjectsHelper
   end
   
   def format_activity_description(text)
-    h(truncate(text, 250).gsub(%r{<(pre|code)>.*$}m, '...'))
+    h(truncate(text.to_s, 250).gsub(%r{<(pre|code)>.*$}m, '...'))
   end
   
   def project_settings_tabs