diff --git a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/exporters/ChatItemArchiveExporter.kt b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/exporters/ChatItemArchiveExporter.kt
index 2b04d3adf0..1d740517b2 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/exporters/ChatItemArchiveExporter.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/exporters/ChatItemArchiveExporter.kt
@@ -312,7 +312,7 @@ class ChatItemArchiveExporter(
         }
 
         MessageTypes.isThreadMergeType(record.type) -> {
-          builder.updateMessage = record.toRemoteThreadMergeUpdate(record.dateSent)?.takeIf { exportState.recipientIdToAci.contains(builder.authorId) } ?: continue
+          builder.updateMessage = record.toRemoteThreadMergeUpdate(record.dateSent)?.takeIf { exportState.recipientIdToAci[builder.authorId] != null } ?: continue
           transformTimer.emit("thread-merge")
         }