diff --git a/protonmail/messages.go b/protonmail/messages.go
index 89d42ae..843270e 100644
--- a/protonmail/messages.go
+++ b/protonmail/messages.go
@@ -394,7 +394,7 @@ type MessagePackage struct {
 	PasswordHint string
 	Auth         interface{} // TODO
 	Token        string
-	EncToken     string
+	EncToken     string `json:",omitempty"`
 }
 
 type MessagePackageSet struct {