diff --git a/call/audio_send_stream.cc b/call/audio_send_stream.cc
index 5acdc9618f..76480f2362 100644
--- a/call/audio_send_stream.cc
+++ b/call/audio_send_stream.cc
@@ -51,6 +51,12 @@ std::string AudioSendStream::Config::Rtp::ToString() const {
   char buf[1024];
   rtc::SimpleStringBuilder ss(buf);
   ss << "{ssrc: " << ssrc;
+  if (!rid.empty()) {
+    ss << ", rid: " << rid;
+  }
+  if (!mid.empty()) {
+    ss << ", mid: " << mid;
+  }
   ss << ", extmap-allow-mixed: " << (extmap_allow_mixed ? "true" : "false");
   ss << ", extensions: [";
   for (size_t i = 0; i < extensions.size(); ++i) {