diff --git a/packages/grpc-js/src/channel.ts b/packages/grpc-js/src/channel.ts
index fe2bec7c..9d6f0049 100644
--- a/packages/grpc-js/src/channel.ts
+++ b/packages/grpc-js/src/channel.ts
@@ -211,7 +211,7 @@ export class ChannelImplementation implements Channel {
                   ConnectivityState.READY
                 ) {
                   pickResult.subchannel!.startCallStream(
-                    callMetadata,
+                    finalMetadata,
                     callStream
                   );
                 } else {