diff --git a/event.go b/event.go
index 224799c..a322c41 100644
--- a/event.go
+++ b/event.go
@@ -61,6 +61,7 @@ func newEvent(w LevelWriter, level Level) *Event {
 	e.buf = enc.AppendBeginMarker(e.buf)
 	e.w = w
 	e.level = level
+	e.stack = false
 	return e
 }