diff --git a/logic/src/commonMain/kotlin/com/wire/kalium/logic/feature/UserSessionScope.kt b/logic/src/commonMain/kotlin/com/wire/kalium/logic/feature/UserSessionScope.kt
index 289e3a0593d..b3d61a462e8 100644
--- a/logic/src/commonMain/kotlin/com/wire/kalium/logic/feature/UserSessionScope.kt
+++ b/logic/src/commonMain/kotlin/com/wire/kalium/logic/feature/UserSessionScope.kt
@@ -1032,7 +1032,8 @@ class UserSessionScope internal constructor(
             conversationGroupRepository,
             conversationRepository,
             messageRepository,
-            userRepository
+            userRepository,
+            systemMessageInserter
         )
     private val oneOnOneResolver: OneOnOneResolver
         get() = OneOnOneResolverImpl(
diff --git a/logic/src/commonMain/kotlin/com/wire/kalium/logic/feature/conversation/mls/OneOnOneMigrator.kt b/logic/src/commonMain/kotlin/com/wire/kalium/logic/feature/conversation/mls/OneOnOneMigrator.kt
index 5a9359cb840..5737853c8eb 100644
--- a/logic/src/commonMain/kotlin/com/wire/kalium/logic/feature/conversation/mls/OneOnOneMigrator.kt
+++ b/logic/src/commonMain/kotlin/com/wire/kalium/logic/feature/conversation/mls/OneOnOneMigrator.kt
@@ -24,6 +24,7 @@ import com.wire.kalium.logic.data.conversation.ConversationGroupRepository
 import com.wire.kalium.logic.data.conversation.ConversationRepository
 import com.wire.kalium.logic.data.id.ConversationId
 import com.wire.kalium.logic.data.message.MessageRepository
+import com.wire.kalium.logic.data.message.SystemMessageInserter
 import com.wire.kalium.logic.data.user.OtherUser
 import com.wire.kalium.logic.data.user.UserRepository
 import com.wire.kalium.logic.data.user.type.isTeammate
@@ -44,7 +45,8 @@ internal class OneOnOneMigratorImpl(
     private val conversationGroupRepository: ConversationGroupRepository,
     private val conversationRepository: ConversationRepository,
     private val messageRepository: MessageRepository,
-    private val userRepository: UserRepository
+    private val userRepository: UserRepository,
+    private val systemMessageInserter: SystemMessageInserter
 ) : OneOnOneMigrator {
 
     override suspend fun migrateToProteus(user: OtherUser): Either<CoreFailure, ConversationId> =
@@ -87,6 +89,12 @@ internal class OneOnOneMigratorImpl(
                             userId = user.id
                         ).map {
                             mlsConversation
+                        }.also {
+                            systemMessageInserter.insertProtocolChangedSystemMessage(
+                                conversationId = mlsConversation,
+                                senderUserId = user.id,
+                                protocol = Conversation.Protocol.MLS
+                            )
                         }
                     }
             }
diff --git a/logic/src/commonTest/kotlin/com/wire/kalium/logic/feature/conversation/mls/OneOnOneMigratorTest.kt b/logic/src/commonTest/kotlin/com/wire/kalium/logic/feature/conversation/mls/OneOnOneMigratorTest.kt
index e5207ef75c4..d7f199fa13d 100644
--- a/logic/src/commonTest/kotlin/com/wire/kalium/logic/feature/conversation/mls/OneOnOneMigratorTest.kt
+++ b/logic/src/commonTest/kotlin/com/wire/kalium/logic/feature/conversation/mls/OneOnOneMigratorTest.kt
@@ -132,6 +132,10 @@ class OneOnOneMigratorTest {
         coVerify {
             arrangement.messageRepository.moveMessagesToAnotherConversation(any(), any())
         }.wasNotInvoked()
+
+        coVerify {
+            arrangement.systemMessageInserter.insertProtocolChangedSystemMessage(any(), any(), any())
+        }.wasNotInvoked()
     }
 
     @Test
@@ -141,7 +145,7 @@ class OneOnOneMigratorTest {
         )
         val failure = CoreFailure.MissingClientRegistration
 
-        val (_, oneOnOneMigrator) = arrange {
+        val (arrangement, oneOnOneMigrator) = arrange {
             withResolveConversationReturning(Either.Left(failure))
         }
 
@@ -171,6 +175,10 @@ class OneOnOneMigratorTest {
         coVerify {
             arrangement.userRepository.updateActiveOneOnOneConversation(any(), any())
         }.wasNotInvoked()
+
+        coVerify {
+            arrangement.systemMessageInserter.insertProtocolChangedSystemMessage(any(), any(), any())
+        }.wasNotInvoked()
     }
 
     @Test
@@ -212,6 +220,10 @@ class OneOnOneMigratorTest {
         coVerify {
             arrangement.messageRepository.moveMessagesToAnotherConversation(eq(originalConversationId), eq(resolvedConversationId))
         }.wasInvoked(exactly = once)
+
+        coVerify {
+            arrangement.systemMessageInserter.insertProtocolChangedSystemMessage(any(), any(), any())
+        }.wasInvoked(exactly = once)
     }
 
     @Test
@@ -234,6 +246,10 @@ class OneOnOneMigratorTest {
         coVerify {
             arrangement.userRepository.updateActiveOneOnOneConversation(eq(user.id), eq(resolvedConversationId))
         }.wasInvoked(exactly = once)
+
+        coVerify {
+            arrangement.systemMessageInserter.insertProtocolChangedSystemMessage(any(), any(), any())
+        }.wasInvoked(exactly = once)
     }
 
     private class Arrangement(private val block: suspend Arrangement.() -> Unit) :
@@ -249,7 +265,8 @@ class OneOnOneMigratorTest {
                 conversationGroupRepository = conversationGroupRepository,
                 conversationRepository = conversationRepository,
                 messageRepository = messageRepository,
-                userRepository = userRepository
+                userRepository = userRepository,
+                systemMessageInserter = systemMessageInserter
             )
         }
     }
diff --git a/logic/src/commonTest/kotlin/com/wire/kalium/logic/util/arrangement/repository/MessageRepositoryArrangement.kt b/logic/src/commonTest/kotlin/com/wire/kalium/logic/util/arrangement/repository/MessageRepositoryArrangement.kt
index aa947062e5b..5266ec213ac 100644
--- a/logic/src/commonTest/kotlin/com/wire/kalium/logic/util/arrangement/repository/MessageRepositoryArrangement.kt
+++ b/logic/src/commonTest/kotlin/com/wire/kalium/logic/util/arrangement/repository/MessageRepositoryArrangement.kt
@@ -22,6 +22,7 @@ import com.wire.kalium.logic.StorageFailure
 import com.wire.kalium.logic.data.id.ConversationId
 import com.wire.kalium.logic.data.message.Message
 import com.wire.kalium.logic.data.message.MessageRepository
+import com.wire.kalium.logic.data.message.SystemMessageInserter
 import com.wire.kalium.logic.data.notification.LocalNotification
 import com.wire.kalium.logic.functional.Either
 import io.mockative.Mock
@@ -37,6 +38,9 @@ internal interface MessageRepositoryArrangement {
     @Mock
     val messageRepository: MessageRepository
 
+    @Mock
+    val systemMessageInserter: SystemMessageInserter
+
     suspend fun withGetMessageById(
         result: Either<StorageFailure, Message>,
         messageID: Matcher<String> = AnyMatcher(valueOf()),
@@ -68,6 +72,8 @@ internal open class MessageRepositoryArrangementImpl : MessageRepositoryArrangem
     @Mock
     override val messageRepository: MessageRepository = mock(MessageRepository::class)
 
+    override val systemMessageInserter = mock(SystemMessageInserter::class)
+
     override suspend fun withGetMessageById(
         result: Either<StorageFailure, Message>,
         messageID: Matcher<String>,