diff --git a/redisson/src/main/java/org/redisson/api/search/aggregate/Expression.java b/redisson/src/main/java/org/redisson/api/search/aggregate/Expression.java
index 072c7c481..b1b3847ac 100644
--- a/redisson/src/main/java/org/redisson/api/search/aggregate/Expression.java
+++ b/redisson/src/main/java/org/redisson/api/search/aggregate/Expression.java
@@ -16,6 +16,7 @@
 package org.redisson.api.search.aggregate;
 
 /**
+ * Expression that is applied on properties
  *
  * @author Nikita Koksharov
  *