diff --git a/includes/node_widget.theme.inc b/includes/node_widget.theme.inc
index 5cefc98..7ae4836 100644
--- a/includes/node_widget.theme.inc
+++ b/includes/node_widget.theme.inc
@@ -18,7 +18,7 @@ function node_widget_theme() {
 /**
  * Theme function for node_widget_element widget.
  */
-function theme_node_widget_element(&$element) {
+function theme_node_widget_element($element) {
   return $element['#children'];
 }
 
@@ -27,4 +27,4 @@ function theme_node_widget_element(&$element) {
  */
 function theme_node_widget_form($form) {
   return drupal_render($form);
-}
\ No newline at end of file
+}
diff --git a/modules/content.node_widget.inc b/modules/content.node_widget.inc
index 03f543b..e09070c 100644
--- a/modules/content.node_widget.inc
+++ b/modules/content.node_widget.inc
@@ -4,7 +4,7 @@
 /**
  * Implementation of hook_node_widget_form_alter()
  */
-function content_node_widget_form_alter(&$form, &$form_state, $form_id) {
+function content_node_widget_form_alter($form, $form_state, $form_id) {
   if (isset($form['type']) && isset($form['#node']) && $form['type']['#value'] .'_node_widget_form' == $form_id) {
     module_load_include('inc', 'content', 'includes/content.node_form');
     foreach (content_node_widget_supported_fields($form['#node']->type) as $field) {
@@ -19,7 +19,7 @@ function content_node_widget_form_alter(&$form, &$form_state, $form_id) {
 /**
  * Implementation of hook_node_widget_is_empty()
  */
-function content_node_widget_is_empty(&$form, &$form_state) {
+function content_node_widget_is_empty($form, $form_state) {
   if (is_array($form['#field_info'])) {
     foreach ($form['#field_info'] as $name => $field) {
       foreach ($form_state['values'][$name] as $item) {
diff --git a/modules/node.node_widget.inc b/modules/node.node_widget.inc
index c403b72..a48011f 100644
--- a/modules/node.node_widget.inc
+++ b/modules/node.node_widget.inc
@@ -4,7 +4,7 @@
 /**
  * Implementation of hook_node_widget_form_alter()
  */
-function node_node_widget_form_alter(&$form, &$form_state, $form_id) {
+function node_node_widget_form_alter($form, $form_state, $form_id) {
   if (isset($form['type']) && isset($form['#node']) && $form['type']['#value'] .'_node_widget_form' == $form_id) {
 
     module_load_include('inc', 'node', 'node.pages');
@@ -50,7 +50,7 @@ function node_node_widget_widget_settings($type) {
 /**
  * Implementation of hook_node_widget_is_empty()
  */
-function node_node_widget_is_empty(&$form, &$form_state) {
+function node_node_widget_is_empty($form, $form_state) {
   // @todo: make this more accurate considering also other fields
   return empty($form_state['values']['title']);
 }
diff --git a/node_widget.module b/node_widget.module
index 5843c22..f505c2d 100644
--- a/node_widget.module
+++ b/node_widget.module
@@ -54,7 +54,7 @@ function node_widget_widget_info() {
 /**
  * Implementation of hook_widget()
  */
-function node_widget_widget(&$form, &$form_state, $field, $items, $delta = 0) {
+function node_widget_widget($form, $form_state, $field, $items, $delta = 0) {
   $element = array();
   if ($field['widget']['type'] == 'node_widget_node_form') {
 
@@ -128,7 +128,7 @@ function node_widget_widget_settings($op, $widget) {
 /**
  * The #value_callback for the node_widget_element type element.
  */
-function node_widget_element_value(&$element, $edit = FALSE) {
+function node_widget_element_value($element, $edit = FALSE) {
   $values = array();
   foreach ($element['#default_value'] as $delta => $value) {
     $values[$delta]['nid'] = isset($value['node_widget']) ? $value['node_widget']['nid'] : $value['nid'];
@@ -141,7 +141,7 @@ function node_widget_element_value(&$element, $edit = FALSE) {
  *
  * @see: node_widget_elements()
  */
-function node_widget_element_process($element, $edit, &$form_state, &$form) {
+function node_widget_element_process($element, $edit, $form_state, $form) {
 
   // Handle default values.
   $node = new stdClass();
@@ -163,8 +163,8 @@ function node_widget_element_process($element, $edit, &$form_state, &$form) {
 /**
  * Add callback to form object
  */
-function node_widget_add_callback(&$form, $type, $callback) {
+function node_widget_add_callback($form, $type, $callback) {
   if (empty($form[$type]) || !in_array($callback, $form[$type])) {
     $form[$type][] = $callback;
   }
-}
\ No newline at end of file
+}