diff --git a/src/eosjs-jssig.ts b/src/eosjs-jssig.ts
index 610261372..51b47a9dc 100644
--- a/src/eosjs-jssig.ts
+++ b/src/eosjs-jssig.ts
@@ -48,7 +48,7 @@ class JsSignatureProvider implements SignatureProvider {
     /** @param privateKeys private keys to sign with */
     constructor(privateKeys: string[]) {
         for (const k of privateKeys) {
-            const priv = PrivateKey.fromString(k).toElliptic();
+            const priv = PrivateKey.fromString(k).toElliptic(defaultEc);
             const pubStr = PublicKey.fromElliptic(priv, KeyType.k1).toString();
             this.keys.set(pubStr, priv);
             this.availableKeys.push(pubStr);
diff --git a/src/eosjs-numeric.ts b/src/eosjs-numeric.ts
index cbb40e65d..ad8ba5df0 100644
--- a/src/eosjs-numeric.ts
+++ b/src/eosjs-numeric.ts
@@ -266,24 +266,6 @@ export interface Key {
     data: Uint8Array;
 }
 
-/** Construct the digest from transaction details */
-export function digestFromSerializedData(
-    chainId: string,
-    serializedTransaction: Uint8Array,
-    serializedContextFreeData?: Uint8Array,
-    e = new ec('secp256k1')) {
-    const signBuf = Buffer.concat([
-        new Buffer(chainId, 'hex'),
-        new Buffer(serializedTransaction),
-        new Buffer(
-            serializedContextFreeData ?
-                new Uint8Array(e.hash(serializedContextFreeData).update(serializedContextFreeData).digest()) :
-                new Uint8Array(32)
-        ),
-    ]);
-    return e.hash().update(signBuf).digest();
-}
-
 function digestSuffixRipemd160(data: Uint8Array, suffix: string) {
     const d = new Uint8Array(data.length + suffix.length);
     for (let i = 0; i < data.length; ++i) {
diff --git a/src/tests/eosjs-jssig.test.ts b/src/tests/eosjs-jssig.test.ts
index 807fbc1eb..5080d7f6e 100644
--- a/src/tests/eosjs-jssig.test.ts
+++ b/src/tests/eosjs-jssig.test.ts
@@ -1,7 +1,10 @@
-import { JsSignatureProvider } from '../eosjs-jssig';
 import { ec } from 'elliptic';
+
 import { Signature, PrivateKey, PublicKey } from '../eosjs-key-conversions';
-import { digestFromSerializedData } from '../eosjs-numeric';
+import {
+    JsSignatureProvider,
+    digestFromSerializedData
+} from '../eosjs-jssig';
 import { SignatureProviderArgs } from '../eosjs-api-interfaces';
 
 describe('JsSignatureProvider', () => {