diff --git a/README.txt b/README.txt
index c815b50..e75afd0 100644
--- a/README.txt
+++ b/README.txt
@@ -35,3 +35,12 @@ mongodb_field_storage uses collections like fields_current.node,
 fields_current.taxonomy_term, fields_revision.user... the dot is allowed in
 the name of mongodb collections. Before the dot it uses fields_current or
 fields_revision and puts the entity type after.
+
+Field Storage Configuration
+===========================
+
+When the 'mongodb_field_storage' module is enabled the default field storage is
+NOT changed. If you want to use it as the default storage you have define that
+in 'settings.php'. Example:
+
+$conf['field_storage_default'] = 'mongodb_field_storage';
diff --git a/mongodb_field_storage/mongodb_field_storage.install b/mongodb_field_storage/mongodb_field_storage.install
index cf0491f..09d7912 100644
--- a/mongodb_field_storage/mongodb_field_storage.install
+++ b/mongodb_field_storage/mongodb_field_storage.install
@@ -3,10 +3,3 @@
  * @file
  * Install, update and uninstall functions for the mongodb field storage module.
  */
-
-/**
- * Implements hook_install().
- */
-function mongodb_field_storage_install() {
-  variable_set('field_storage_default', 'mongodb_field_storage');
-}