diff --git a/call/rtp_transport_controller_send.cc b/call/rtp_transport_controller_send.cc
index fd9597dfe9..64b18e5866 100644
--- a/call/rtp_transport_controller_send.cc
+++ b/call/rtp_transport_controller_send.cc
@@ -280,8 +280,11 @@ void RtpTransportControllerSend::OnNetworkRouteChanged(
       ApplyOrLiftRelayCap(IsRelayed(network_route));
 
   // Check whether the network route has changed on each transport.
-  auto result =
-      network_routes_.insert(std::make_pair(transport_name, network_route));
+  auto result = network_routes_.insert(
+      // Explicit conversion of transport_name to std::string here is necessary
+      // to support some platforms that cannot yet deal with implicit
+      // conversion in these types of situations.
+      std::make_pair(std::string(transport_name), network_route));
   auto kv = result.first;
   bool inserted = result.second;
   if (inserted || !(kv->second == network_route)) {