diff --git a/lib/datasource/docker.js b/lib/datasource/docker.js
index 5bb9b6fdd865e83cc139790a2e751cb1ac1d75f9..1c4f7cf6118404b2e31883e3ec63175de6778e53 100644
--- a/lib/datasource/docker.js
+++ b/lib/datasource/docker.js
@@ -61,7 +61,7 @@ async function getAuthHeaders(registry, repository) {
       logger.warn({ err }, 'docker registry failure: internal error');
       throw new Error('registry-failure');
     }
-    logger.warn('Error obtaining docker token');
+    logger.warn({ registry, repository }, 'Error obtaining docker token');
     return null;
   }
 }