diff --git a/src/crypto/store/indexeddb-crypto-store.ts b/src/crypto/store/indexeddb-crypto-store.ts
index 824ad0050..25b13ea4e 100644
--- a/src/crypto/store/indexeddb-crypto-store.ts
+++ b/src/crypto/store/indexeddb-crypto-store.ts
@@ -204,9 +204,12 @@ export class IndexedDBCryptoStore implements CryptoStore {
                 );
 
                 try {
+                    if (!(globalThis.localStorage instanceof Storage)) {
+                        throw new Error("localStorage is not available");
+                    }
                     return new LocalStorageCryptoStore(globalThis.localStorage);
                 } catch (e) {
-                    logger.warn(`unable to open localStorage: falling back to in-memory store: ${e}`);
+                    logger.warn(`Unable to open localStorage: falling back to in-memory store: ${e}`);
                     return new MemoryCryptoStore();
                 }
             })