diff --git a/dev/install/DatabaseAdapterRegistry.php b/dev/install/DatabaseAdapterRegistry.php
index 29ffd7501..ceb9a5098 100644
--- a/dev/install/DatabaseAdapterRegistry.php
+++ b/dev/install/DatabaseAdapterRegistry.php
@@ -129,7 +129,7 @@ class DatabaseAdapterRegistry {
 	 *
 	 * @return array
 	 */
-	public function get_default_fields() {
+	public static function get_default_fields() {
 		return self::$default_fields;
 	}