1 files changed, 1 insertions, 3 deletions
diff --git a/src/ts/0x.js.ts b/src/ts/0x.js.ts
index 6d6d5fed6..3b16b643b 100644
--- a/src/ts/0x.js.ts
+++ b/src/ts/0x.js.ts
@@ -9,13 +9,11 @@ export interface ECSignature {
     s: string;
 }
 
-export type ETHAddress = string;
-
 export class ZeroEx {
     /**
      * Checks if the signature is valid
      */
-    public static isValidSignature(data: string, signature: ECSignature, signer: ETHAddress): boolean {
+    public static isValidSignature(data: string, signature: ECSignature, signer: ETHAddressHex): boolean {
         const dataBuff = ethUtil.toBuffer(data);
         const msgHashBuff = ethUtil.hashPersonalMessage(dataBuff);
         try {