diff --git a/docs/grpc/ruby.md b/docs/grpc/ruby.md
index 0a6dcfc2..5725707a 100644
--- a/docs/grpc/ruby.md
+++ b/docs/grpc/ruby.md
@@ -146,6 +146,11 @@ class MacaroonInterceptor < GRPC::ClientInterceptor
     metadata['macaroon'] = macaroon
     yield
   end
+
+  def server_streamer(request:, call:, method:, metadata:)
+    metadata['macaroon'] = macaroon
+    yield
+  end
 end
 ```