diff --git a/lib/workers/pr/pr-body.js b/lib/workers/pr/pr-body.js
index f5b9b76d78e19a33a10c729900873ef1050a6f3c..ca7a990fba2be7748516934e13428e43fcc6330f 100644
--- a/lib/workers/pr/pr-body.js
+++ b/lib/workers/pr/pr-body.js
@@ -48,7 +48,9 @@ async function getPrBody(config) {
       let fullUrl = sourceUrl;
       if (sourceDirectory) {
         fullUrl =
-          sourceUrl.replace(/\/?$/, '/') + sourceDirectory.replace('^/?/', '');
+          sourceUrl.replace(/\/?$/, '/') +
+          'tree/master/' +
+          sourceDirectory.replace('^/?/', '');
       }
       references.push(`[source](${fullUrl})`);
     }