diff --git a/ui/app/components/hex-as-decimal-input.js b/ui/app/components/hex-as-decimal-input.js
index bbd86b254..e39805787 100644
--- a/ui/app/components/hex-as-decimal-input.js
+++ b/ui/app/components/hex-as-decimal-input.js
@@ -72,6 +72,7 @@ HexAsDecimalInput.prototype.render = function () {
             }
             this.setState({ invalid: msg })
             event.preventDefault()
+            return false
           },
         }),
         h('div', {