# MQTT_WILDCARD_SINGLE

**Kind:** Constant

**Source:** [`packages/microservices/constants.ts`](https://github.com/nestjs/nest/blob/master/packages/microservices/constants.ts#L15)

**Part of:** [Microservices](subsystem-packages-microservices)

## Definition

```ts
'+'
```

## Value

```ts
'+'
```