diff --git a/upload.go b/upload.go
index 169328e..5338780 100755
--- a/upload.go
+++ b/upload.go
@@ -30,7 +30,11 @@ func uploadPTTodo(config Config, transaction *Transaction) error {
 		return err
 	}
 	defer f.Close()
-	fmt.Fprintf(f, `- {"todo":%q, "tags":%q}%s`, transaction.Format(), config.TodoTag, "\n")
+	if config.TodoTag == "" {
+		fmt.Fprintf(f, `- {"todo":%q}%s`, transaction.Format(), "\n")
+	} else {
+		fmt.Fprintf(f, `- {"todo":%q, "tags":%q}%s`, transaction.Format(), config.TodoTag, "\n")
+	}
 	return f.Close()
 }