diff --git a/v3/newrelic/error_events.go b/v3/newrelic/error_events.go
index 07aca4f35..6087865d8 100644
--- a/v3/newrelic/error_events.go
+++ b/v3/newrelic/error_events.go
@@ -32,7 +32,7 @@ func (e *errorEvent) WriteJSON(buf *bytes.Buffer) {
 		w.stringField("spanId", e.SpanID)
 	}
 	if e.Expect {
-		w.stringField("error.expected", "true")
+		w.boolField(expectErrorAttr, true)
 	}
 
 	sharedTransactionIntrinsics(&e.txnEvent, &w)