diff --git a/lib/request_log_analyzer/file_format/rails3.rb b/lib/request_log_analyzer/file_format/rails3.rb
index 08f04a90..b2097c1c 100644
--- a/lib/request_log_analyzer/file_format/rails3.rb
+++ b/lib/request_log_analyzer/file_format/rails3.rb
@@ -100,6 +100,9 @@ class Rails3 < Base
 
       analyze.frequency category: REQUEST_CATEGORIZER, title: 'Process blockers (> 1 sec duration)',
         if: lambda { |request| request[:duration] && request[:duration] > 1.0 }
+      
+      analyze.frequency :error, title: 'Failed requests', line_type: :failure,
+        if: lambda { |request| request[:error] }
 
       analyze.frequency category: lambda { |x| "[#{x[:missing_resource_method]}] #{x[:missing_resource]}" },
         title: 'Routing Errors', if: lambda { |request| !request[:missing_resource].nil? }