diff --git a/entityreference_view_widget.info b/entityreference_view_widget.info
index f988e3d..3f3dd02 100644
--- a/entityreference_view_widget.info
+++ b/entityreference_view_widget.info
@@ -8,3 +8,4 @@ dependencies[] = views
 
 files[] = views/entityreference_view_widget_plugin_display.inc
 files[] = views/entityreference_view_widget_plugin_exposed_form.inc
+files[] = views/entityreference_view_widget_handler_field_checkbox.inc
diff --git a/entityreference_view_widget.module b/entityreference_view_widget.module
index 402e29f..1dd9a68 100644
--- a/entityreference_view_widget.module
+++ b/entityreference_view_widget.module
@@ -342,12 +342,19 @@ function entityreference_view_widget_field_widget_form(&$form, &$form_state, $fi
   // displayed through the view.
   $substitutions = array();
   $result_entities = $view->query->get_result_entities($view->result);
+  $form_element_type = 'action';
+  if (!empty($view->field['entityreference_view_widget'])
+  && get_class($view->field['entityreference_view_widget']) == 'entityreference_view_widget_handler_field_checkbox') {
+    $options = $view->field['entityreference_view_widget']->options;
+    $form_element_type = $options['ervw']['force_single'] ? 'radio' : 'checkbox';
+  }
   foreach ($result_entities[1] as $row_id => $entity) {
     $entity_id = entity_id($entity_type, $entity);
     if (!$view->display_handler->options['hide_left']) {
       $element['add'][$entity_id] = array(
         '#type' => 'checkbox',
         '#refresh_items' => TRUE,
+        '#return_value' => $entity_id,
         '#ajax' => array(
           'path' => 'entityreference_view_widget/ajax/' . $field_name,
           'wrapper' => 'edit-' . str_replace('_', '-', $field_name),
@@ -361,15 +368,20 @@ function entityreference_view_widget_field_widget_form(&$form, &$form_state, $fi
     }
     else {
       $element['add'][$entity_id] = array(
-        '#type' => 'checkbox',
+        '#type' => $form_element_type == 'action' ? 'checkbox' : $form_element_type,
         '#refresh_items' => TRUE,
+        '#return_value' => $entity_id,
       );
+      if ($form_element_type == 'radio') {
+        $element['add'][$entity_id]['#parents'] = array($field_name, $field_language, 'add');
+      }
     }
     $substitutions[] = array(
       'placeholder' => '<!--entityreference-view-widget-action-' . $entity_id . '-->',
       'entity_id' => $entity_id,
     );
   }
+  $element['add']['#tree'] = TRUE;
   $element['#substitutions'] = array(
     '#type' => 'value',
     '#value' => $substitutions,
@@ -384,7 +396,7 @@ function entityreference_view_widget_field_widget_form(&$form, &$form_state, $fi
 function entityreference_view_widget_preprocess_widget(&$variables) {
   $form = $variables['form'];
 
-  // Replace the placeholders in the view with actual checkboxes.
+  // Replace the placeholders in the view with actual form elements.
   $search = array();
   $replace = array();
   foreach ($form['#substitutions']['#value'] as $substitution) {
@@ -480,10 +492,15 @@ function entityreference_view_widget_validate($element, &$form_state) {
   }
   // Then new items (marked for addition).
   if (!empty($element_values['add'])) {
-    $add = array_filter($element_values['add']);
-    foreach ($add as $entity_id => $status) {
-      if (!isset($element_values['items'][$entity_id])) {
-        $value[] = array('target_type' => $target_type, 'target_id' => $entity_id);
+    if (!is_array($element_values['add'])) {
+      $value[] = array('target_type' => $target_type, 'target_id' => $element_values['add']);
+    }
+    else {
+      $add = array_filter($element_values['add']);
+      foreach ($add as $entity_id => $status) {
+        if (!isset($element_values['items'][$entity_id])) {
+          $value[] = array('target_type' => $target_type, 'target_id' => $entity_id);
+        }
       }
     }
   }
diff --git a/views/entityreference_view_widget.views.inc b/views/entityreference_view_widget.views.inc
index 71b4e61..5625f7c 100644
--- a/views/entityreference_view_widget.views.inc
+++ b/views/entityreference_view_widget.views.inc
@@ -43,3 +43,23 @@ function entityreference_view_widget_views_plugins() {
   );
   return $plugins;
 }
+
+/**
+ * Implements hook_views_data_alter().
+ */
+function entityreference_view_widget_views_data_alter(&$data) {
+  foreach (entity_get_info() as $entity_type => $info) {
+    if (isset($info['base table']) && isset($data[$info['base table']]['table'])) {
+      $data[$info['base table']]['entityreference_view_widget'] = array(
+        'title' => $data[$info['base table']]['table']['group'],
+        'group' => t('Entity Reference View Widget Checkbox'),
+        'help' => t('Provide a checkbox to select the row for an entity reference.'),
+        'real field' => $info['entity keys']['id'],
+        'field' => array(
+          'handler' => 'entityreference_view_widget_handler_field_checkbox',
+          'click sortable' => FALSE,
+        ),
+      );
+    }
+  }
+}
diff --git a/views/entityreference_view_widget_handler_field_checkbox.inc b/views/entityreference_view_widget_handler_field_checkbox.inc
new file mode 100644
index 0000000..cadafbf
--- /dev/null
+++ b/views/entityreference_view_widget_handler_field_checkbox.inc
@@ -0,0 +1,47 @@
+<?php
+
+/**
+* @file
+* Views field handler. Contains all relevant VBO options and related logic.
+* Implements the Views Form API.
+*/
+
+class entityreference_view_widget_handler_field_checkbox extends views_handler_field {
+  var $revision = FALSE;
+
+  function render($values) {
+    $entity_id = $values->{$this->view->base_field};
+    if (empty($entity_id)) {
+      return;
+    }
+    return '<!--entityreference-view-widget-action-' . $entity_id . '-->';
+  }
+
+  function option_definition() {
+    $options = parent::option_definition();
+    $options['ervw'] = array(
+      'contains' => array(
+        'force_single' => array('default' => FALSE),
+      ),
+    );
+    return $options;
+  }
+
+  function options_form(&$form, &$form_state) {
+    parent::options_form($form, $form_state);
+
+    $form['ervw'] = array(
+      '#type' => 'fieldset',
+      '#title' => t('Entity Reference Views Widget'),
+      '#collapsible' => TRUE,
+      '#collapsed' => FALSE,
+    );
+
+    $form['ervw']['force_single'] = array(
+      '#type' => 'checkbox',
+      '#title' => t('Force single'),
+      '#default_value' => $this->options['ervw']['force_single'],
+      '#description' => t('Check this box to restrict selection to a single value.'),
+    );
+  }
+}