diff --git a/includes/form.inc b/includes/form.inc
index 5dff07d47433ab7ba07f430287684e3b6b2ab25f..c4f6f351fe3a01d080f710b9630f64f9b70f81ba 100644
--- a/includes/form.inc
+++ b/includes/form.inc
@@ -4003,6 +4003,36 @@ function _form_set_class(&$element, $class = array()) {
   }
 }
 
+/**
+ * Helper form element validator: integer.
+ */
+function element_validate_integer($element, &$form_state) {
+  $value = $element['#value'];
+  if ($value !== '' && (!is_numeric($value) || intval($value) != $value)) {
+    form_error($element, t('%name must be an integer.', array('%name' => $element['#title'])));
+  }
+}
+
+/**
+ * Helper form element validator: integer > 0.
+ */
+function element_validate_integer_positive($element, &$form_state) {
+  $value = $element['#value'];
+  if ($value !== '' && (!is_numeric($value) || intval($value) != $value || $value <= 0)) {
+    form_error($element, t('%name must be a positive integer.', array('%name' => $element['#title'])));
+  }
+}
+
+/**
+ * Helper form element validator: number.
+ */
+function element_validate_number($element, &$form_state) {
+  $value = $element['#value'];
+  if ($value != '' && !is_numeric($value)) {
+    form_error($element, t('%name must be a number.', array('%name' => $element['#title'])));
+  }
+}
+
 /**
  * @} End of "defgroup form_api".
  */
diff --git a/modules/field/field.module b/modules/field/field.module
index af9e8c8355a9cfae4abda4454be0aa1c581866fa..6432ce06062c7db490fdd8ba402686cf3af20dd8 100644
--- a/modules/field/field.module
+++ b/modules/field/field.module
@@ -1174,33 +1174,3 @@ function theme_field($variables) {
 
   return $output;
 }
-
-/**
- * Helper form element validator: integer.
- */
-function _element_validate_integer($element, &$form_state) {
-  $value = $element['#value'];
-  if ($value !== '' && (!is_numeric($value) || intval($value) != $value)) {
-    form_error($element, t('%name must be an integer.', array('%name' => $element['#title'])));
-  }
-}
-
-/**
- * Helper form element validator: integer > 0.
- */
-function _element_validate_integer_positive($element, &$form_state) {
-  $value = $element['#value'];
-  if ($value !== '' && (!is_numeric($value) || intval($value) != $value || $value <= 0)) {
-    form_error($element, t('%name must be a positive integer.', array('%name' => $element['#title'])));
-  }
-}
-
-/**
- * Helper form element validator: number.
- */
-function _element_validate_number($element, &$form_state) {
-  $value = $element['#value'];
-  if ($value != '' && !is_numeric($value)) {
-    form_error($element, t('%name must be a number.', array('%name' => $element['#title'])));
-  }
-}
diff --git a/modules/field/modules/number/number.module b/modules/field/modules/number/number.module
index 3c8132cb31e404d9fa4432be3cc6675bd007fbbd..fd536730836f5821123e4f682a466de40f15558b 100644
--- a/modules/field/modules/number/number.module
+++ b/modules/field/modules/number/number.module
@@ -98,14 +98,14 @@ function number_field_instance_settings_form($field, $instance) {
     '#title' => t('Minimum'),
     '#default_value' => $settings['min'],
     '#description' => t('The minimum value that should be allowed in this field. Leave blank for no minimum.'),
-    '#element_validate' => array('_element_validate_number'),
+    '#element_validate' => array('element_validate_number'),
   );
   $form['max'] = array(
     '#type' => 'textfield',
     '#title' => t('Maximum'),
     '#default_value' => $settings['max'],
     '#description' => t('The maximum value that should be allowed in this field. Leave blank for no maximum.'),
-    '#element_validate' => array('_element_validate_number'),
+    '#element_validate' => array('element_validate_number'),
   );
   $form['prefix'] = array(
     '#type' => 'textfield',
diff --git a/modules/field/modules/text/text.module b/modules/field/modules/text/text.module
index 89c605cf2c046eb48d448e20d27a63ef88a8583f..d73814faaafa007f2f13499616ecd17edcf24b7f 100644
--- a/modules/field/modules/text/text.module
+++ b/modules/field/modules/text/text.module
@@ -71,7 +71,7 @@ function text_field_settings_form($field, $instance, $has_data) {
       '#default_value' => $settings['max_length'],
       '#required' => TRUE,
       '#description' => t('The maximum length of the field in characters.'),
-      '#element_validate' => array('_element_validate_integer_positive'),
+      '#element_validate' => array('element_validate_integer_positive'),
       // @todo: If $has_data, add a validate handler that only allows
       // max_length to increase.
       '#disabled' => $has_data,
@@ -227,7 +227,7 @@ function text_field_formatter_settings_form($field, $instance, $view_mode, $form
       '#type' => 'textfield',
       '#size' => 10,
       '#default_value' => $settings['trim_length'],
-      '#element_validate' => array('_element_validate_integer_positive'),
+      '#element_validate' => array('element_validate_integer_positive'),
       '#required' => TRUE,
     );
   }
@@ -480,7 +480,7 @@ function text_field_widget_settings_form($field, $instance) {
       '#title' => t('Size of textfield'),
       '#default_value' => $settings['size'],
       '#required' => TRUE,
-      '#element_validate' => array('_element_validate_integer_positive'),
+      '#element_validate' => array('element_validate_integer_positive'),
     );
   }
   else {
@@ -489,7 +489,7 @@ function text_field_widget_settings_form($field, $instance) {
       '#title' => t('Rows'),
       '#default_value' => $settings['rows'],
       '#required' => TRUE,
-      '#element_validate' => array('_element_validate_integer_positive'),
+      '#element_validate' => array('element_validate_integer_positive'),
     );
   }
 
diff --git a/modules/field_ui/field_ui.api.php b/modules/field_ui/field_ui.api.php
index e07a9373df33fa1fb86e13facadbee2b1a5fdf78..b6446520a549b516ecb376fd12abac10206bb441 100644
--- a/modules/field_ui/field_ui.api.php
+++ b/modules/field_ui/field_ui.api.php
@@ -42,7 +42,7 @@ function hook_field_settings_form($field, $instance, $has_data) {
     '#title' => t('Maximum length'),
     '#default_value' => $settings['max_length'],
     '#required' => FALSE,
-    '#element_validate' => array('_element_validate_integer_positive'),
+    '#element_validate' => array('element_validate_integer_positive'),
     '#description' => t('The maximum length of the field in characters. Leave blank for an unlimited size.'),
   );
   return $form;
@@ -113,7 +113,7 @@ function hook_field_widget_settings_form($field, $instance) {
       '#type' => 'textfield',
       '#title' => t('Size of textfield'),
       '#default_value' => $settings['size'],
-      '#element_validate' => array('_element_validate_integer_positive'),
+      '#element_validate' => array('element_validate_integer_positive'),
       '#required' => TRUE,
     );
   }
@@ -122,7 +122,7 @@ function hook_field_widget_settings_form($field, $instance) {
       '#type' => 'textfield',
       '#title' => t('Rows'),
       '#default_value' => $settings['rows'],
-      '#element_validate' => array('_element_validate_integer_positive'),
+      '#element_validate' => array('element_validate_integer_positive'),
       '#required' => TRUE,
     );
   }
@@ -160,7 +160,7 @@ function hook_field_formatter_settings_form($field, $instance, $view_mode, $form
       '#type' => 'textfield',
       '#size' => 20,
       '#default_value' => $settings['trim_length'],
-      '#element_validate' => array('_element_validate_integer_positive'),
+      '#element_validate' => array('element_validate_integer_positive'),
       '#required' => TRUE,
     );
   }