diff --git a/packages/json-wallets/src.ts/keystore.ts b/packages/json-wallets/src.ts/keystore.ts
index 25c2712f67..940ce6b6a8 100644
--- a/packages/json-wallets/src.ts/keystore.ts
+++ b/packages/json-wallets/src.ts/keystore.ts
@@ -213,7 +213,7 @@ function _computeKdfKey<T>(data: any, password: Bytes | string, pbkdf2Func: Pbkd
 export function decryptSync(json: string, password: Bytes | string): KeystoreAccount {
     const data = JSON.parse(json);
 
-    const key = _computeKdfKey(data, password, pbkdf2Sync, scrypt.scryptSync);
+    const key = _computeKdfKey(data, password, pbkdf2Sync, scrypt.syncScrypt);
     return _getAccount(data, key);
 }
 
diff --git a/packages/json-wallets/thirdparty.d.ts b/packages/json-wallets/thirdparty.d.ts
index 8186557aab..53dabbd81e 100644
--- a/packages/json-wallets/thirdparty.d.ts
+++ b/packages/json-wallets/thirdparty.d.ts
@@ -24,7 +24,7 @@ declare module "aes-js" {
 declare module "scrypt-js" {
     export type ProgressCallback = (progress: number) => boolean | void;
     export function scrypt(password: Uint8Array, salt: Uint8Array, N: number, r: number, p: number, dkLen: number, callback?: ProgressCallback): Promise<Uint8Array>;
-    export function scryptSync(password: Uint8Array, salt: Uint8Array, N: number, r: number, p: number, dkLen: number): Uint8Array;
+    export function syncScrypt(password: Uint8Array, salt: Uint8Array, N: number, r: number, p: number, dkLen: number): Uint8Array;
 }
 
 declare module "uuid" {