diff --git a/data_pes.go b/data_pes.go
index d3fbc15..06511cd 100644
--- a/data_pes.go
+++ b/data_pes.go
@@ -18,6 +18,7 @@ const (
 
 // Stream IDs
 const (
+	StreamIDPrivateStream1 = 189
 	StreamIDPaddingStream  = 190
 	StreamIDPrivateStream2 = 191
 )