diff --git a/libvirt/README.rst b/libvirt/README.rst
index 498202a..2564cf3 100644
--- a/libvirt/README.rst
+++ b/libvirt/README.rst
@@ -28,7 +28,7 @@ an interactive shell that configures everything.  Here's an example::
 	export EXTERNAL_NETWORK=172.30.20.0/24
 	export EXTERNAL_IP=172.30.20.1/24
 
-Using ``./readconfig.sh madcloud.yaml`` also sets the madcloud
+Using ``source ./readconfig.sh madcloud.yaml`` also sets the madcloud
 environment variables. Use ``default.yaml`` or ``madcloud.yaml`` as
 templates to make custom configurations.
 
diff --git a/libvirt/readconfig.sh b/libvirt/readconfig.sh
old mode 100755
new mode 100644