diff --git a/spring-integration-mqtt/src/main/java/org/springframework/integration/mqtt/event/MqttMessageSentEvent.java b/spring-integration-mqtt/src/main/java/org/springframework/integration/mqtt/event/MqttMessageSentEvent.java
index 2579351512..fd9343226e 100644
--- a/spring-integration-mqtt/src/main/java/org/springframework/integration/mqtt/event/MqttMessageSentEvent.java
+++ b/spring-integration-mqtt/src/main/java/org/springframework/integration/mqtt/event/MqttMessageSentEvent.java
@@ -19,7 +19,7 @@ package org.springframework.integration.mqtt.event;
 import org.springframework.messaging.Message;
 
 /**
- * An event emitted (when using aysnc) when the client indicates that a message
+ * An event emitted (when using async) when the client indicates that a message
  * has been sent.
  *
  * @author Gary Russell