diff --git a/ts/models/conversation.ts b/ts/models/conversation.ts
index 04a8c56bd..a8427bafe 100644
--- a/ts/models/conversation.ts
+++ b/ts/models/conversation.ts
@@ -836,6 +836,8 @@ export class ConversationModel extends Backbone.Model<ConversationAttributes> {
     }
 
     if (
+      this.get('lastDisappearingMessageChangeTimestamp') &&
+      lastDisappearingMessageChangeTimestamp &&
       this.get('lastDisappearingMessageChangeTimestamp') > lastDisappearingMessageChangeTimestamp
     ) {
       window.log.info(