1 files changed, 7 insertions, 1 deletions
diff --git a/ui/app/send.js b/ui/app/send.js
index 97ed29e4a..b8af19028 100644
--- a/ui/app/send.js
+++ b/ui/app/send.js
@@ -7,6 +7,7 @@ const actions = require('./actions')
 const util = require('./util')
 const numericBalance = require('./util').numericBalance
 const addressSummary = require('./util').addressSummary
+const isHex = require('./util').isHex
 const EthBalance = require('./components/eth-balance')
 const ethUtil = require('ethereumjs-util')
 const RangeSlider = require('./components/range-slider')
@@ -190,7 +191,7 @@ SendTransactionScreen.prototype.render = function () {
           marginBottom: '16px',
         },
       }, [
-        'Transactional Data (optional)',
+        'Transaction Data (optional)',
       ]),
 
       // 'data' field
@@ -312,6 +313,11 @@ SendTransactionScreen.prototype.onSubmit = function (gasPrice) {
     return this.props.dispatch(actions.displayWarning(message))
   }
 
+  if (!isHex(ethUtil.stripHexPrefix(txData)) && txData) {
+    message = 'Transaction data must be hex string.'
+    return this.props.dispatch(actions.displayWarning(message))
+  }
+
   this.props.dispatch(actions.hideWarning())
 
   var txParams = {