diff --git a/webtrees/rootfs/run b/webtrees/rootfs/run
index 183162072..f19e18085 100644
--- a/webtrees/rootfs/run
+++ b/webtrees/rootfs/run
@@ -61,3 +61,5 @@ export WT_EMAIL="me@example.com"
 #############
 # START APP #
 #############
+
+PRETTY_URLS_FILE=""