diff --git a/spec/unit/crypto/CrossSigningInfo.spec.js b/spec/unit/crypto/CrossSigningInfo.spec.js
index 92f80aa82..4c746147d 100644
--- a/spec/unit/crypto/CrossSigningInfo.spec.js
+++ b/spec/unit/crypto/CrossSigningInfo.spec.js
@@ -245,6 +245,6 @@ describe.each([
         expect(nokey).toBeNull();
 
         const key = await getCrossSigningKeyCache("self_signing", "");
-        expect(key).toEqual(testKey);
+        expect(new Uint8Array(key)).toEqual(testKey);
     });
 });
diff --git a/src/crypto/store/localStorage-crypto-store.js b/src/crypto/store/localStorage-crypto-store.js
index 1e63affee..3e673168a 100644
--- a/src/crypto/store/localStorage-crypto-store.js
+++ b/src/crypto/store/localStorage-crypto-store.js
@@ -369,7 +369,7 @@ export class LocalStorageCryptoStore extends MemoryCryptoStore {
 
     getSecretStorePrivateKey(txn, func, type) {
         const key = getJsonItem(this.store, E2E_PREFIX + `ssss_cache.${type}`);
-        func(key ? Uint8Array.from(key) : key);
+        func(key);
     }
 
     storeCrossSigningKeys(txn, keys) {
@@ -380,7 +380,7 @@ export class LocalStorageCryptoStore extends MemoryCryptoStore {
 
     storeSecretStorePrivateKey(txn, type, key) {
         setJsonItem(
-            this.store, E2E_PREFIX + `ssss_cache.${type}`, Array.from(key),
+            this.store, E2E_PREFIX + `ssss_cache.${type}`, key,
         );
     }