diff --git a/packages/hdwallet-native/src/crypto/isolation/engines/default/bip39.ts b/packages/hdwallet-native/src/crypto/isolation/engines/default/bip39.ts
index 565c1d93a..f563e66a7 100644
--- a/packages/hdwallet-native/src/crypto/isolation/engines/default/bip39.ts
+++ b/packages/hdwallet-native/src/crypto/isolation/engines/default/bip39.ts
@@ -24,8 +24,6 @@ export class Mnemonic extends Revocable(class {}) implements Bip39Mnemonic {
   }
 
   async toSeed(passphrase?: string): Promise<SeedType> {
-    if (passphrase !== undefined && typeof passphrase !== "string") throw new Error("bad passphrase type");
-
     const mnemonic = this.#mnemonic;
     const salt = new TextEncoder().encode(`mnemonic${passphrase ?? ""}`.normalize("NFKD"));