diff --git a/models/document/src/migration.ts b/models/document/src/migration.ts
index c6490ebf78..b3067fb350 100644
--- a/models/document/src/migration.ts
+++ b/models/document/src/migration.ts
@@ -282,6 +282,7 @@ async function migrateContentField (client: MigrationClient): Promise<void> {
   }
 
   const documents = await client.find<Document>(DOMAIN_DOCUMENT, {
+    _class: document.class.Document,
     content: { $exists: true }
   })