diff --git a/src/warden-server/doc/README b/src/warden-server/doc/README
index 81f7d12275068194a96019ade3e0a65ec4933f85..0bddb0df09c7cbf821e5cc4aec339bbb4a18bf2e 100644
--- a/src/warden-server/doc/README
+++ b/src/warden-server/doc/README
@@ -178,7 +178,7 @@ C. Installation
                           e.g.
 
                           %VALID_STRINGS = (
-                            'type'          => ['portscan', 'bruteforce', 'probe', 'spam', 'phishing', 'botnet_c_c', 'dos', 'malware', 'copyright', 'webattack', 'test', 'other'],
+                            'type'          => ['portscan', 'bruteforce', 'probe', 'spam', 'phishing', 'botnet_c_c', 'dos', 'malware', 'copyright', 'webattack', 'vulnerability', 'test', 'other'],
                             'source_type'   => ['IP', 'URL', 'Reply-To:']
                           );