diff --git a/src/matrix/SessionContainer.js b/src/matrix/SessionContainer.js
index 8e3d147e..3e3dab66 100644
--- a/src/matrix/SessionContainer.js
+++ b/src/matrix/SessionContainer.js
@@ -248,6 +248,7 @@ export class SessionContainer {
         await this._session.load(log);
         if (dehydratedDevice) {
             await log.wrap("dehydrateIdentity", log => this._session.dehydrateIdentity(dehydratedDevice, log));
+            await this._session.setupDehydratedDevice(dehydratedDevice.key, log);
         } else if (!this._session.hasIdentity) {
             this._status.set(LoadStatus.SessionSetup);
             await log.wrap("createIdentity", log => this._session.createIdentity(log));
diff --git a/src/matrix/e2ee/Dehydration.js b/src/matrix/e2ee/Dehydration.js
index 65e2b90a..461e6c42 100644
--- a/src/matrix/e2ee/Dehydration.js
+++ b/src/matrix/e2ee/Dehydration.js
@@ -36,7 +36,7 @@ export async function uploadAccountAsDehydratedDevice(account, hsApi, key, devic
     const response = await hsApi.createDehydratedDevice({
         device_data: {
             algorithm: DEHYDRATION_LIBOLM_PICKLE_ALGORITHM,
-            account: account.pickleWithKey(key.binaryKey),
+            account: account.pickleWithKey(key.binaryKey.slice()),
             passphrase: key.description?.passphraseParams || {},
         },
         initial_device_display_name: deviceDisplayName