diff --git a/media/webrtc/signaling/src/mediapipeline/MediaPipeline.cpp b/media/webrtc/signaling/src/mediapipeline/MediaPipeline.cpp
index 088d032ff06c..f6396715256f 100644
--- a/media/webrtc/signaling/src/mediapipeline/MediaPipeline.cpp
+++ b/media/webrtc/signaling/src/mediapipeline/MediaPipeline.cpp
@@ -72,6 +72,8 @@ nsresult MediaPipeline::Init() {
 // the pipeline on the main thread.
 void MediaPipeline::DetachTransportInt() {
   transport_->Detach();
+  rtp_transport_ = NULL;
+  rtcp_transport_ = NULL;
 }
 
 void MediaPipeline::DetachTransport() {