diff --git a/webrtc/RTCDtlsTransport-state.html b/webrtc/RTCDtlsTransport-state.html
index ca49fcc95f297e..33d49677c496dd 100644
--- a/webrtc/RTCDtlsTransport-state.html
+++ b/webrtc/RTCDtlsTransport-state.html
@@ -93,8 +93,22 @@
   t.add_cleanup(() => pc1.close());
   t.add_cleanup(() => pc2.close());
 
-  pc1.onicecandidate = e => pc2.addIceCandidate(e.candidate);
-  pc2.onicecandidate = e => pc1.addIceCandidate(e.candidate);
+  pc1.onicecandidate = e => {
+    if (e.candidate) {
+      pc2.addIceCandidate({
+        candidate: e.candidate.candidate,
+        sdpMid: e.candidate.sdpMid
+      });
+    }
+  }
+  pc2.onicecandidate = e => {
+    if (e.candidate) {
+      pc1.addIceCandidate({
+        candidate: e.candidate.candidate,
+        sdpMid: e.candidate.sdpMid
+      });
+    }
+  }
 
   pc1.addTransceiver("video");
   pc1.addTransceiver("audio");