diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/query/QueryStringValue.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/query/QueryStringValue.kt
index da32d745d6..2461492ba7 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/query/QueryStringValue.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/query/QueryStringValue.kt
@@ -39,6 +39,6 @@ sealed interface QueryStringValue {
         INSENSITIVE,
         NORMALIZED
     }
-
-    fun isNormalized() = this is ContentQueryStringValue && case == Case.NORMALIZED
 }
+
+internal fun QueryStringValue.isNormalized() = this is QueryStringValue.ContentQueryStringValue && case == QueryStringValue.Case.NORMALIZED
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 e86bd27ed2..f9f78b9181 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
@@ -29,6 +29,7 @@ import io.realm.Sort
 import io.realm.kotlin.where
 import org.matrix.android.sdk.api.query.ActiveSpaceFilter
 import org.matrix.android.sdk.api.query.RoomCategoryFilter
+import org.matrix.android.sdk.api.query.isNormalized
 import org.matrix.android.sdk.api.session.room.ResultBoundaries
 import org.matrix.android.sdk.api.session.room.RoomSortOrder
 import org.matrix.android.sdk.api.session.room.RoomSummaryQueryParams