diff --git a/config.yaml b/config.yaml
index beb67a27..e8f9ad7f 100644
--- a/config.yaml
+++ b/config.yaml
@@ -27,6 +27,7 @@ options:
       testing purposes (cloud deployment is not a typical use case).
   source:
     type: string
+    default: cloud:precise-updates/folsom
     description: |
       Optional configuration to support use of additional sources such as:
       .