diff --git a/packages/kit/src/utils/routing.js b/packages/kit/src/utils/routing.js
index fb6d219ad4fb..701360fd9fff 100644
--- a/packages/kit/src/utils/routing.js
+++ b/packages/kit/src/utils/routing.js
@@ -67,6 +67,8 @@ export function parse_route_id(id) {
 													.replace(/\?/g, '%3F')
 													// escape characters that have special meaning in regex
 													.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
+													// replace '--' to '/' for flat file system
+													.replace(/--/g, '/')
 											); // TODO handle encoding
 										})
 										.join('')