diff --git a/angular-prompt.html b/angular-prompt.html
index 4a0b2c8..347fcab 100644
--- a/angular-prompt.html
+++ b/angular-prompt.html
@@ -9,8 +9,8 @@ <h4 class="modal-title">{{options.title}}</h4>
             {{options.message}}
         </p>
 
-        <form id="cgPromptForm" name="cgPromptForm" ng-if="options.input" ng-submit="submit()">
-            <div class="form-group" ng-class="{'has-error':cgPromptForm.$invalid && changed}">
+        <form id="cgPromptForm" name="form.prompt" ng-if="options.input" ng-submit="submit()">
+            <div class="form-group" ng-class="{'has-error':form.prompt.$invalid && changed}">
                 <label for="cgPromptInput">{{options.label}}</label>
                 <input id="cgPromptInput" type="text" class="form-control"  placeholder="{{options.label}}" ng-model="input.name" required ng-change="changed=true" ng-if="!options.values || options.values.length === 0"/ autofocus="autofocus">
                 <div class="input-group" ng-if="options.values">
diff --git a/angular-prompt.js b/angular-prompt.js
index b11bb0d..602e076 100644
--- a/angular-prompt.js
+++ b/angular-prompt.js
@@ -60,12 +60,14 @@ angular.module('cgPrompt').controller('cgPromptCtrl',['$scope','options','$timeo
 
     $scope.options = options;
 
+    $scope.form = {};
+
     $scope.buttonClicked = function(button){
         if (button.cancel){
             $scope.$dismiss();
             return;
         }
-        if (options.input && angular.element(document.querySelector('#cgPromptForm')).scope().cgPromptForm.$invalid){
+        if (options.input && $scope.form.prompt.$invalid){
             $scope.changed = true;
             return;
         }