diff --git a/austin-handler/src/main/java/com/java3y/austin/handler/deduplication/service/FrequencyDeduplicationService.java b/austin-handler/src/main/java/com/java3y/austin/handler/deduplication/service/FrequencyDeduplicationService.java
index 78dd8a4..207ca83 100644
--- a/austin-handler/src/main/java/com/java3y/austin/handler/deduplication/service/FrequencyDeduplicationService.java
+++ b/austin-handler/src/main/java/com/java3y/austin/handler/deduplication/service/FrequencyDeduplicationService.java
@@ -31,7 +31,7 @@ public class FrequencyDeduplicationService extends AbstractDeduplicationService
     /**
      * 业务规则去重 构建key
      * <p>
-     * key ： receiver  + sendChannel
+     * key ： receiver + sendChannel
      * <p>
      * 一天内一个用户只能收到某个渠道的消息 N 次
      *