diff --git a/html/control.html b/html/control.html
index ea9b0c7..8e1e344 100644
--- a/html/control.html
+++ b/html/control.html
@@ -775,9 +775,11 @@
         });
         rtcPeerConnection.addEventListener('datachannel', function(e) {
           const dc = e.channel;
-          dc.addEventListener('message', function(e) {
-            dc.send('pong');
-          });
+          if (dc.label === 'keepalive') {
+            dc.addEventListener('message', function(e) {
+              dc.send('pong');
+            });
+          }
         });
         rtcPeerConnection.addTransceiver('video', { direction: 'recvonly' });
         //pc.addTransceiver('audio', {direction: 'recvonly'});
diff --git a/html/webrtc.html b/html/webrtc.html
index 6da573f..599b35a 100644
--- a/html/webrtc.html
+++ b/html/webrtc.html
@@ -77,9 +77,11 @@
 
           pc.addEventListener('datachannel', function(e) {
             const dc = e.channel;
-            dc.addEventListener('message', function(e) {
-              dc.send('pong');
-            });
+            if (dc.label === 'keepalive') {
+              dc.addEventListener('message', function(e) {
+                dc.send('pong');
+              });
+            }
           });
 
           pc.remote_pc_id = request.id;