diff --git a/webrtc/WebRtcTransport.cpp b/webrtc/WebRtcTransport.cpp
index 342dabc0..9a58fb21 100644
--- a/webrtc/WebRtcTransport.cpp
+++ b/webrtc/WebRtcTransport.cpp
@@ -593,7 +593,7 @@ void WebRtcTransportImp::onBeforeSortedRtp(const RtpPayloadInfo &info, const Rtp
 
 void WebRtcTransportImp::onSendRtp(const RtpPacket::Ptr &rtp, bool flush){
     auto &pt = _send_rtp_pt[rtp->type];
-    if (!pt) {
+    if (pt == 0xFF) {
         //忽略，对方不支持该编码类型
         return;
     }
diff --git a/webrtc/WebRtcTransport.h b/webrtc/WebRtcTransport.h
index 2b8f8a2c..50f45604 100644
--- a/webrtc/WebRtcTransport.h
+++ b/webrtc/WebRtcTransport.h
@@ -212,7 +212,7 @@ private:
     //rtc rtp推流的视频ssrc
     uint32_t _recv_video_ssrc;
     //记录协商的rtp的pt类型
-    uint8_t _send_rtp_pt[2] = {0, 0};
+    uint8_t _send_rtp_pt[2] = {0xFF, 0xFF};
     //复合udp端口，接收一切rtp与rtcp
     Socket::Ptr _socket;
     //推流的rtsp源