1 files changed, 1 insertions, 1 deletions
diff --git a/lib/abi.js b/lib/abi.js
index 80cc0d551..99d2ba932 100644
--- a/lib/abi.js
+++ b/lib/abi.js
@@ -267,7 +267,7 @@ var methodSignature = function (json, name) {
     result += inputTypes.join(',');
     result += ')';
 
-    return web3.sha3(result);
+    return web3.sha3(web3.fromAscii(result));
 };
 
 module.exports = {