diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/events/model/AggregatedRelations.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/events/model/AggregatedRelations.kt
index 7f043dc0f7..6577a9b41e 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/events/model/AggregatedRelations.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/events/model/AggregatedRelations.kt
@@ -19,6 +19,7 @@ import com.squareup.moshi.Json
 import com.squareup.moshi.JsonClass
 
 /**
+ * Server side relation aggregation.
  * ```
  *  {
  *       "m.annotation": {