diff --git a/web3.js/src/publickey.ts b/web3.js/src/publickey.ts
index 25ee299e5c..e5ca6f0aa3 100644
--- a/web3.js/src/publickey.ts
+++ b/web3.js/src/publickey.ts
@@ -69,7 +69,7 @@ export class PublicKey extends Struct {
         this._bn = new BN(value);
       }
 
-      if (this._bn.byteLength() > 32) {
+      if (this._bn.byteLength() > PUBLIC_KEY_LENGTH) {
         throw new Error(`Invalid public key input`);
       }
     }