diff --git a/src/crypto/index.ts b/src/crypto/index.ts
index 03650d069ad..f9b77e3b402 100644
--- a/src/crypto/index.ts
+++ b/src/crypto/index.ts
@@ -953,6 +953,8 @@ export class Crypto extends EventEmitter {
             // sign with the device fingerprint
             await this.signObject(data.auth_data);
 
+            await this.backupManager.enableKeyBackup(data);
+
             builder.addSessionBackup(data);
         }