diff --git a/lib/routing.js b/lib/routing.js
index e1ab391..2d42341 100644
--- a/lib/routing.js
+++ b/lib/routing.js
@@ -34,7 +34,8 @@ const mappings = [
   { field: 'fs:fontSize' },
   { field: 'si:squaredImage', type: 'bool' },
   { field: 'code:code' },
-  { field: 'es:exportSize' }
+  { field: 'es:exportSize' },
+  { field: 'wm:watermark', type: 'bool' }
 ]
 
 const reverseMappings = mappings.map(mapping =>