diff --git a/includes/config.inc b/includes/config.inc
index 845d58d..3b72e9c 100644
--- a/includes/config.inc
+++ b/includes/config.inc
@@ -341,8 +341,13 @@ class DrupalVerifiedStorageSQL extends DrupalConfigVerifiedStorage {
       ->execute();
   }
 
-  static public function getNamesWithPrefix($prefix = '') {
-    return db_query('SELECT name FROM {config} WHERE name LIKE :name', array(':name' => db_like($prefix) . '%'))->fetchCol();
+  static public function getNamesWithPrefix($prefix = '*') {
+    if ($prefix == '*') {
+      return db_query('SELECT name FROM {config}')->fetchCol();
+    }
+    else {
+      return db_query('SELECT name FROM {config} WHERE name LIKE :name', array(':name' => db_like($prefix) . '%'))->fetchCol();
+    }
   }
 }