diff --git a/lib/util/host-rules.js b/lib/util/host-rules.js
index 0b711f66c42413c4b5c49cd8f63de0d7e83693c0..e6ac512ad2e035bede99cc0f84df4d79572aa404 100644
--- a/lib/util/host-rules.js
+++ b/lib/util/host-rules.js
@@ -60,6 +60,7 @@ function update(params) {
       delete conf.default;
     }
   }
+  logger.debug({ config }, 'Setting hostRule');
   platforms[platform][host] = { ...platforms[platform][host], ...config };
   return true;
 }