diff --git a/lib/index.js b/lib/index.js
index 13b11db21c..e6b8f66d86 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -9,7 +9,7 @@ const Trie = require('merkle-patricia-tree/secure.js')
 const fakeBlockchain = require('./fakeBlockChain.js')
 const BN = ethUtil.BN
 
-// require the percomiled contracts
+// require the precompiled contracts
 const num01 = require('./precompiled/01-ecrecover.js')
 const num02 = require('./precompiled/02-sha256.js')
 const num03 = require('./precompiled/03-ripemd160.js')