diff --git a/modules/field/field.form.inc b/modules/field/field.form.inc
index 280f778..59d0d89 100644
--- a/modules/field/field.form.inc
+++ b/modules/field/field.form.inc
@@ -283,6 +283,16 @@ function field_multiple_value_form($field, $instance, $langcode, $items, &$form,
     }
   }
 
+  // Allow other modules to alter this form.
+  $context = array(
+    'form' => $form,
+    'field' => $field,
+    'instance' => $instance,
+    'langcode' => $langcode,
+    'items' => $items,
+  );
+  drupal_alter('field_multiple_value_form', $field_elements, $form_state, $context);
+
   return $field_elements;
 }