diff --git a/src/rpc/stream.rs b/src/rpc/stream.rs
index b7f3bef..062d49c 100644
--- a/src/rpc/stream.rs
+++ b/src/rpc/stream.rs
@@ -43,6 +43,8 @@ pub enum RpcType {
     Async,
     #[serde(rename = "source")]
     Source,
+    #[serde(rename = "duplex")]
+    Duplex,
 }
 
 #[derive(Debug, PartialEq)]