diff --git a/src/lib/watchers/abstract/url-watcher.ts b/src/lib/watchers/abstract/url-watcher.ts
index 195d01a..49ac684 100644
--- a/src/lib/watchers/abstract/url-watcher.ts
+++ b/src/lib/watchers/abstract/url-watcher.ts
@@ -17,7 +17,7 @@ export function urlWatcher(conf: Conf, checkValidity: (data: any) => Promise<Url
     async function checkResult(data: any) {
       const validity = await checkValidity(data)
       if (validity.error) {
-        throw new UrlWatcherError('Validity error')
+        throw new UrlWatcherError(validity.error)
       }
     }