diff --git a/migrations/5_deploy_erc20_mixer.js b/migrations/5_deploy_erc20_mixer.js
index d16e5f4..03109fb 100644
--- a/migrations/5_deploy_erc20_mixer.js
+++ b/migrations/5_deploy_erc20_mixer.js
@@ -8,7 +8,7 @@ const ERC20Mock = artifacts.require('ERC20Mock')
 
 module.exports = function(deployer, network, accounts) {
   return deployer.then(async () => {
-    const { MERKLE_TREE_HEIGHT, ETH_AMOUNT, EMPTY_ELEMENT, ERC20_TOKEN, TOKEN_AMOUNT } = process.env
+    const { MERKLE_TREE_HEIGHT, EMPTY_ELEMENT, ERC20_TOKEN, TOKEN_AMOUNT } = process.env
     const verifier = await Verifier.deployed()
     const hasherInstance = await hasherContract.deployed()
     await ERC20Mixer.link(hasherContract, hasherInstance.address)