diff --git a/cpp/core/internal/mediums/webrtc/webrtc_socket.cc b/cpp/core/internal/mediums/webrtc/webrtc_socket.cc
index 159cfaed..ff7f1f18 100644
--- a/cpp/core/internal/mediums/webrtc/webrtc_socket.cc
+++ b/cpp/core/internal/mediums/webrtc/webrtc_socket.cc
@@ -49,9 +49,8 @@ InputStream& WebRtcSocket::GetInputStream() { return pipe_.GetInputStream(); }
 OutputStream& WebRtcSocket::GetOutputStream() { return output_stream_; }
 
 void WebRtcSocket::Close() {
-  if (IsClosed()) return;
+  if (closed_.Set(true)) return;
 
-  closed_.Set(true);
   pipe_.GetInputStream().Close();
   pipe_.GetOutputStream().Close();
   data_channel_->Close();