diff --git a/lib/faye/websocket/hybi_parser.js b/lib/faye/websocket/hybi_parser.js
index 398f35d..3726e8b 100644
--- a/lib/faye/websocket/hybi_parser.js
+++ b/lib/faye/websocket/hybi_parser.js
@@ -46,20 +46,21 @@ var instance = {
   },
   
   ERRORS: {
-    normal_closure:   1000,
-    going_away:       1001,
-    protocol_error:   1002,
-    unacceptable:     1003,
-    encoding_error:   1007,
-    policy_violation: 1008,
-    too_large:        1009,
-    extension_error:  1010
+    normal_closure:       1000,
+    going_away:           1001,
+    protocol_error:       1002,
+    unacceptable:         1003,
+    encoding_error:       1007,
+    policy_violation:     1008,
+    too_large:            1009,
+    extension_error:      1010,
+    unexpected_condition: 1011
   },
   
   FRAGMENTED_OPCODES: [0,1,2],
   OPENING_OPCODES:    [1,2],
   
-  ERROR_CODES: [1000,1001,1002,1003,1007,1008,1009,1010],
+  ERROR_CODES: [1000,1001,1002,1003,1007,1008,1009,1010,1011],
   
   UTF8_MATCH: /^([\x00-\x7F]|[\xC2-\xDF][\x80-\xBF]|\xE0[\xA0-\xBF][\x80-\xBF]|[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}|\xED[\x80-\x9F][\x80-\xBF]|\xF0[\x90-\xBF][\x80-\xBF]{2}|[\xF1-\xF3][\x80-\xBF]{3}|\xF4[\x80-\x8F][\x80-\xBF]{2})*$/,