diff --git a/webrtc-stats.html b/webrtc-stats.html
index c90f243..9777268 100644
--- a/webrtc-stats.html
+++ b/webrtc-stats.html
@@ -1020,6 +1020,8 @@ <h3>
              double               totalAssemblyTime;
              unsigned long long   retransmittedPacketsReceived;
              unsigned long long   retransmittedBytesReceived;
+             unsigned long        rtxSsrc;
+             unsigned long        fecSsrc;
             };</pre>
           <section>
             <h2>
@@ -1737,6 +1739,28 @@ <h2>
                   negotiated, retransmitted packets can not be identified and this member does not [= map/exist =].
                 </p>
               </dd>
+              <dt>
+                <dfn>rtxSsrc</dfn> of type <span class=
+                "idlMemberType">unsigned long</span>
+              </dt>
+              <dd>
+                <p>
+                  If RTX is negotiated for retransmissions on a separate <a>RTP stream</a>, this is the SSRC
+                  of the RTX stream that is associated with this stream's {{RTCRtpStreamStats/ssrc}}.
+                  If RTX is not negotiated, this value is not present.
+                </p>
+              </dd>
+              <dt>
+                <dfn>fecSsrc</dfn> of type <span class=
+                "idlMemberType">unsigned long</span>
+              </dt>
+              <dd>
+                <p>
+                  If a FEC mechanism that uses a separate <a>RTP stream</a> is negotiated, this is the SSRC
+                  of the FEC stream that is associated with this stream's {{RTCRtpStreamStats/ssrc}}.
+                  If FEC is not negotiated or uses the same <a>RTP stream</a>, this value is not present.
+                </p>
+              </dd>
             </dl>
           </section>
         </div>
@@ -1883,6 +1907,7 @@ <h3>
              unsigned long long   headerBytesSent;
              unsigned long long   retransmittedPacketsSent;
              unsigned long long   retransmittedBytesSent;
+             unsigned long        rtxSsrc;
              double               targetBitrate;
              unsigned long long   totalEncodedBytesTarget;
              unsigned long        frameWidth;
@@ -1992,6 +2017,17 @@ <h2>
                   accounted for here.
                 </p>
               </dd>
+              <dt>
+                <dfn>rtxSsrc</dfn> of type <span class=
+                "idlMemberType">unsigned long</span>
+              </dt>
+              <dd>
+                <p>
+                  If RTX is negotiated for retransmissions on a separate <a>RTP stream</a>, this is the SSRC
+                  of the RTX stream that is associated with this stream's {{RTCRtpStreamStats/ssrc}}.
+                  If RTX is not negotiated, this value is not present.
+                </p>
+              </dd>
               <dt>
                 <dfn>targetBitrate</dfn> of type <span class=
                 "idlMemberType">double</span>