diff --git a/stack.sh b/stack.sh
index 35a7b3d..3e59b61 100755
--- a/stack.sh
+++ b/stack.sh
@@ -1266,7 +1266,8 @@
     FLAT_NETWORK_BRIDGE=$(grep -o 'flat_network_bridge=[^.]*' /proc/cmdline | cut -d= -f 2)
     read_password XENAPI_PASSWORD "ENTER A PASSWORD TO USE FOR XEN."
     add_nova_flag "--connection_type=xenapi"
-    add_nova_flag "--xenapi_connection_url=http://169.254.0.1"
+    XENAPI_CONNECTION_URL=${XENAPI_CONNECTION_URL:-"http://169.254.0.1"}
+    add_nova_flag "--xenapi_connection_url=$XENAPI_CONNECTION_URL"
     add_nova_flag "--xenapi_connection_username=root"
     add_nova_flag "--xenapi_connection_password=$XENAPI_PASSWORD"
     add_nova_flag "--noflat_injected"