diff --git a/rtc_base/socket_address.cc b/rtc_base/socket_address.cc
index 8601fc9040..4fc19d5831 100644
--- a/rtc_base/socket_address.cc
+++ b/rtc_base/socket_address.cc
@@ -162,7 +162,7 @@ std::string SocketAddress::HostAsSensitiveURIString() const {
 }
 
 std::string SocketAddress::PortAsString() const {
-  return std::to_string(port_);
+  return rtc::ToString(port_);
 }
 
 std::string SocketAddress::ToString() const {