diff --git a/tracing/protos/chrome_track_event.proto b/tracing/protos/chrome_track_event.proto
index fbaf9f9fc..aa15ff1aa 100644
--- a/tracing/protos/chrome_track_event.proto
+++ b/tracing/protos/chrome_track_event.proto
@@ -672,6 +672,7 @@ message RendererMainThreadTaskExecution {
     TASK_TYPE_INTERNAL_INPUT_BLOCKING = 77;
     TASK_TYPE_WEB_GPU = 78;
     TASK_TYPE_INTERNAL_POST_MESSAGE_FORWARDING = 79;
+    TASK_TYPE_INTERNAL_NAVIGATION_CANCELLATION = 80;
   }
 
   enum FrameType {