diff --git a/src/hap-types.ts b/src/hap-types.ts
index eb47bd7..398bb3b 100644
--- a/src/hap-types.ts
+++ b/src/hap-types.ts
@@ -1026,6 +1026,8 @@ export const Characteristics = {
   'UniqueID': 'D8B76298-42E7-5FFD-B1D6-1782D9A1F936',
   '23B88013-D5E2-5300-9DF1-D51D90CADED9': 'ClipID',
   'ClipID': '23B88013-D5E2-5300-9DF1-D51D90CADED9',
+  'A11C14A7-BB9B-4085-8597-68CF63964BF8': 'OpticalSignal',
+  'OpticalSignal': 'A11C14A7-BB9B-4085-8597-68CF63964BF8'
 }
 
 export const Categories = {