diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/RoomSummaryQueryParams.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/RoomSummaryQueryParams.kt
index 88ec2de768..b440857518 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/RoomSummaryQueryParams.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/RoomSummaryQueryParams.kt
@@ -39,12 +39,6 @@ fun spaceSummaryQueryParams(init: (RoomSummaryQueryParams.Builder.() -> Unit) =
             .build()
 }
 
-enum class RoomCategoryFilter {
-    ONLY_DM,
-    ONLY_ROOMS,
-    ALL
-}
-
 /**
  * This class can be used to filter room summaries to use with:
  * [org.matrix.android.sdk.api.session.room.Room] and [org.matrix.android.sdk.api.session.room.RoomService]
@@ -59,11 +53,10 @@ data class RoomSummaryQueryParams(
         val excludeType: List<String?>?,
         val includeType: List<String?>?,
         val activeSpaceFilter: ActiveSpaceFilter?,
-        var activeGroupId: String? = null
+        val activeGroupId: String? = null
 ) {
 
     class Builder {
-
         var roomId: QueryStringValue = QueryStringValue.IsNotEmpty
         var displayName: QueryStringValue = QueryStringValue.IsNotEmpty
         var canonicalAlias: QueryStringValue = QueryStringValue.NoCondition
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/summary/RoomSummaryDataSource.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/summary/RoomSummaryDataSource.kt
index bff1af60ca..0b8c6df806 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/summary/RoomSummaryDataSource.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/summary/RoomSummaryDataSource.kt
@@ -247,10 +247,10 @@ internal class RoomSummaryDataSource @Inject constructor(@SessionDatabase privat
 
         queryParams.roomCategoryFilter?.let {
             when (it) {
-                RoomCategoryFilter.ONLY_DM -> query.equalTo(RoomSummaryEntityFields.IS_DIRECT, true)
-                RoomCategoryFilter.ONLY_ROOMS -> query.equalTo(RoomSummaryEntityFields.IS_DIRECT, false)
+                RoomCategoryFilter.ONLY_DM                 -> query.equalTo(RoomSummaryEntityFields.IS_DIRECT, true)
+                RoomCategoryFilter.ONLY_ROOMS              -> query.equalTo(RoomSummaryEntityFields.IS_DIRECT, false)
                 RoomCategoryFilter.ONLY_WITH_NOTIFICATIONS -> query.greaterThan(RoomSummaryEntityFields.NOTIFICATION_COUNT, 0)
-                RoomCategoryFilter.ALL -> {
+                RoomCategoryFilter.ALL                     -> {
                     // nop
                 }
             }
@@ -274,15 +274,15 @@ internal class RoomSummaryDataSource @Inject constructor(@SessionDatabase privat
             query.equalTo(RoomSummaryEntityFields.ROOM_TYPE, it)
         }
         when (queryParams.roomCategoryFilter) {
-            RoomCategoryFilter.ONLY_DM -> query.equalTo(RoomSummaryEntityFields.IS_DIRECT, true)
-            RoomCategoryFilter.ONLY_ROOMS -> query.equalTo(RoomSummaryEntityFields.IS_DIRECT, false)
+            RoomCategoryFilter.ONLY_DM                 -> query.equalTo(RoomSummaryEntityFields.IS_DIRECT, true)
+            RoomCategoryFilter.ONLY_ROOMS              -> query.equalTo(RoomSummaryEntityFields.IS_DIRECT, false)
             RoomCategoryFilter.ONLY_WITH_NOTIFICATIONS -> query.greaterThan(RoomSummaryEntityFields.NOTIFICATION_COUNT, 0)
-            RoomCategoryFilter.ALL -> Unit // nop
+            RoomCategoryFilter.ALL                     -> Unit // nop
         }
 
         // Timber.w("VAL: activeSpaceId : ${queryParams.activeSpaceId}")
         when (queryParams.activeSpaceFilter) {
-            is ActiveSpaceFilter.ActiveSpace -> {
+            is ActiveSpaceFilter.ActiveSpace  -> {
                 // It's annoying but for now realm java does not support querying in primitive list :/
                 // https://github.com/realm/realm-java/issues/5361
                 if (queryParams.activeSpaceFilter.currentSpaceId == null) {
@@ -300,8 +300,8 @@ internal class RoomSummaryDataSource @Inject constructor(@SessionDatabase privat
             }
         }
 
-        if (queryParams.activeGroupId != null) {
-            query.contains(RoomSummaryEntityFields.GROUP_IDS, queryParams.activeGroupId!!)
+        queryParams.activeGroupId?.let { activeGroupId ->
+            query.contains(RoomSummaryEntityFields.GROUP_IDS, activeGroupId)
         }
         return query
     }