2 files changed, 8 insertions, 8 deletions
diff --git a/packages/order-utils/src/asset_data_utils.ts b/packages/order-utils/src/asset_data_utils.ts
index 81e34218f..6a4e7600d 100644
--- a/packages/order-utils/src/asset_data_utils.ts
+++ b/packages/order-utils/src/asset_data_utils.ts
@@ -1,18 +1,11 @@
 import { AssetProxyId, ERC20AssetData, ERC721AssetData } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
 import BN = require('bn.js');
+import ethAbi = require('ethereumjs-abi');
 import ethUtil = require('ethereumjs-util');
 
 import { constants } from './constants';
 
-// TODO: Push upstream to DefinitelyTyped
-interface EthAbi {
-    simpleEncode(signature: string, ...args: any[]): Buffer;
-    rawDecode(signature: string[], data: Buffer): any[];
-}
-// tslint:disable:no-var-requires
-const ethAbi = require('ethereumjs-abi') as EthAbi;
-
 export const assetDataUtils = {
     encodeUint256(value: BigNumber): Buffer {
         const base = 10;
diff --git a/packages/typescript-typings/types/ethereumjs-abi/index.d.ts b/packages/typescript-typings/types/ethereumjs-abi/index.d.ts
new file mode 100644
index 000000000..af8630c2d
--- /dev/null
+++ b/packages/typescript-typings/types/ethereumjs-abi/index.d.ts
@@ -0,0 +1,7 @@
+declare module 'ethereumjs-util' {
+    export function soliditySHA3(argTypes: string[], args: any[]): Buffer;
+    export function soliditySHA256(argTypes: string[], args: any[]): Buffer;
+    export function methodID(name: string, types: string[]): Buffer;
+    export function simpleEncode(signature: string, ...args: any[]): Buffer;
+    export function rawDecode(signature: string[], data: Buffer): any[];
+}