diff --git a/README.txt b/README.txt
index 94f3e6d..24d7cc4 100644
--- a/README.txt
+++ b/README.txt
@@ -128,6 +128,11 @@ Q: How should I update from Drupal 6?
 A: Run update.php; Enable the og-migrate module and execute all the migration
    plugins.
 
+Q: How should I update from OG user roles D6?
+A: Create a new variable named og_7000_access_field_default_value and set it to
+   FALSE, this will ensure that global roles are used (as in D6), You can later
+   modify each group to allow specific roles and permissions per group.
+
 Q: How should I update from a previous Drupal 7 release (e.g. 7.x-1.0 to
    7.x-1.1)?
 A: Same as updating from Drupal 6 -- Run update.php; If requested enable the
diff --git a/og_ui/includes/migrate/7000/populate_field.inc b/og_ui/includes/migrate/7000/populate_field.inc
index 13ed128..5902f6c 100644
--- a/og_ui/includes/migrate/7000/populate_field.inc
+++ b/og_ui/includes/migrate/7000/populate_field.inc
@@ -41,7 +41,7 @@ class OgUiPopulateField extends DynamicMigration {
     $this->destination = new MigrateDestinationNode($bundle);
 
     $this->addFieldMapping('nid', 'nid');
-    $this->addFieldMapping(OG_DEFAULT_ACCESS_FIELD, NULL)->defaultValue(TRUE);
+    $this->addFieldMapping(OG_DEFAULT_ACCESS_FIELD, NULL)->defaultValue((int) variable_get('og_7000_access_field_default_value', TRUE));
   }
 
   /**
diff --git a/og_ui/og_ui.module b/og_ui/og_ui.module
index cb830a7..d601400 100644
--- a/og_ui/og_ui.module
+++ b/og_ui/og_ui.module
@@ -1141,7 +1141,9 @@ function og_ui_migrate_api() {
   $migrations = array();
   if (db_table_exists('d6_og')) {
     $migrations['OgUiMigrateAddField'] = array('class_name' => 'OgUiMigrateAddField');
-    $migrations['OgUiSetRoles'] = array('class_name' => 'OgUiSetRoles');
+    if (variable_get('og_7000_access_field_default_value', TRUE)) {
+      $migrations['OgUiSetRoles'] = array('class_name' => 'OgUiSetRoles');
+    }
 
     foreach (node_type_get_names() as $bundle => $value) {
       $machine_name = 'OgUiPopulateField' . ucfirst($bundle);