diff --git a/packages/acn/src/enums.ts b/packages/acn/src/enums.ts
index 584f966..97bbc25 100644
--- a/packages/acn/src/enums.ts
+++ b/packages/acn/src/enums.ts
@@ -1,5 +1,6 @@
 export enum Protocol {
   SDT = 1,
+  E131 = 4,
 }
 
 export enum SDTVector {