diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/CryptoManager.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/CryptoManager.kt
index 28262683..d7f9777c 100755
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/CryptoManager.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/CryptoManager.kt
@@ -54,6 +54,7 @@ import im.vector.matrix.android.internal.crypto.store.IMXCryptoStore
 import im.vector.matrix.android.internal.crypto.tasks.*
 import im.vector.matrix.android.internal.crypto.verification.DefaultSasVerificationService
 import im.vector.matrix.android.internal.di.MoshiProvider
+import im.vector.matrix.android.internal.session.room.members.RoomMembers
 import im.vector.matrix.android.internal.session.sync.model.SyncResponse
 import im.vector.matrix.android.internal.task.TaskExecutor
 import im.vector.matrix.android.internal.task.configureWith
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/live/RealmLiveEncryptionObserver.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/live/RealmLiveEncryptionObserver.kt
index 4fd9dc9f..bca038d8 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/live/RealmLiveEncryptionObserver.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/live/RealmLiveEncryptionObserver.kt
@@ -41,6 +41,10 @@ internal class RoomEncryptionEnabler(monarchy: Monarchy) : RealmLiveEntityObserv
 
         val eventIds = inserted.mapNotNull { it.asDomain().eventId }
 
+        if (eventIds.isEmpty()) {
+            return
+        }
+
         val workParam = EnableEncryptionWorker.Params(eventIds)
         val workData = WorkerParamsFactory.toData(workParam)