make stackrc source localrc
diff --git a/stackrc b/stackrc
index 2d265d3..3580ae1 100644
--- a/stackrc
+++ b/stackrc
@@ -34,3 +34,6 @@
 # openstack-munin is a collection of munin plugins for monitoring the stack
 MUNIN_REPO=https://github.com/cloudbuilders/openstack-munin.git
 MUNIN_BRANCH=master
+
+# allow local overwrites
+[ -f ./localrc ] && source ./localrc