diff --git a/cereal/log.capnp b/cereal/log.capnp
index 7a8871ffdf..f29322cce8 100644
--- a/cereal/log.capnp
+++ b/cereal/log.capnp
@@ -2268,6 +2268,7 @@ struct LiveDelayData {
   totalPoints @1 :Int32;
   points @2 :List(List(Float32));
   isEstimated @3 :Bool;
+  correlation @4 :Float32;
 }
 
 struct LiveMapDataDEPRECATED {