diff --git a/libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/room/RoomContentForwarder.kt b/libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/room/RoomContentForwarder.kt
index e000c2f916..39cde68c31 100644
--- a/libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/room/RoomContentForwarder.kt
+++ b/libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/room/RoomContentForwarder.kt
@@ -49,7 +49,7 @@ class RoomContentForwarder(
         val content = (messageLikeContent.kind as? MsgLikeKind.Message)?.content
             ?: throw ForwardEventException(toRoomIds)
 
-        val targetRooms = toRoomIds.mapNotNull { roomId -> roomListService.roomOrNull(roomId.value) }
+        val targetRooms = toRoomIds.toSet().mapNotNull { roomId -> roomListService.roomOrNull(roomId.value) }
         val failedForwardingTo = mutableSetOf<RoomId>()
         targetRooms.parallelMap { room ->
             room.use { targetRoom ->