diff --git a/src/datasources/interior-api.ts b/src/datasources/interior-api.ts
index 7cc8c99..5abbf39 100644
--- a/src/datasources/interior-api.ts
+++ b/src/datasources/interior-api.ts
@@ -101,7 +101,8 @@ export class InteriorAPI extends BaseSQLDataSource {
         const uriMatch = `${or}/${it}/room${addZero(i.roomNumber)}.`;
         const foundUri = validUris.find(({ uri }) => uri.includes(uriMatch));
         if (foundUri) {
-          i.uri = foundUri.uri;
+          i.uri =
+            foundUri.uri.indexOf('/') !== 0 ? `/${foundUri.uri}` : foundUri.uri;
           return true;
         }
         return false;