diff --git a/events/lex.go b/events/lex.go
index 70bfbd0b..dd635fbd 100644
--- a/events/lex.go
+++ b/events/lex.go
@@ -46,7 +46,7 @@ type SessionAttributes map[string]string
 type Slots map[string]*string
 
 type LexResponse struct {
-	SessionAttributes SessionAttributes `json:"sessionAttributes,omitempty"`
+	SessionAttributes SessionAttributes `json:"sessionAttributes"`
 	DialogAction      LexDialogAction   `json:"dialogAction,omitempty"`
 }