diff --git a/packages/clients/bgw/src/mapConfiguration.ts b/packages/clients/bgw/src/mapConfiguration.ts
index 558e82185..0f7a8dd3a 100644
--- a/packages/clients/bgw/src/mapConfiguration.ts
+++ b/packages/clients/bgw/src/mapConfiguration.ts
@@ -29,7 +29,7 @@ const mapConfig = {
         plugins: {
           filter: {
             layerName: {
-              14003: 'Badestellen',
+              '14003': 'Badestellen',
             },
             category: {
               14003: {