diff --git a/xxclient/src/main/java/io/elixxir/xxclient/utils/TypeAlias.kt b/xxclient/src/main/java/io/elixxir/xxclient/utils/TypeAlias.kt
index 64d1349daff7e338348c112ce3a1eaef3a274246..7b9124cc005218b89d1a4c0ee5085b0516634548 100644
--- a/xxclient/src/main/java/io/elixxir/xxclient/utils/TypeAlias.kt
+++ b/xxclient/src/main/java/io/elixxir/xxclient/utils/TypeAlias.kt
@@ -21,4 +21,5 @@ typealias Ndf = ByteArray
 typealias CertificateData = ByteArray
 typealias FileTransferId = Byte
 typealias Data = ByteArray
-typealias UdId = Long
\ No newline at end of file
+typealias UdId = Long
+typealias GroupId = ByteArray
\ No newline at end of file