diff --git a/lib/modules/datasource/docker/index.ts b/lib/modules/datasource/docker/index.ts
index bbccb62b5833ae774629394f6051a79b46721a35..ced20ac94b3465e29de14f93aa0a86a5b927d3e2 100644
--- a/lib/modules/datasource/docker/index.ts
+++ b/lib/modules/datasource/docker/index.ts
@@ -394,7 +394,7 @@ export class DockerDatasource extends Datasource {
     mode: 'head' | 'get' = 'get'
   ): Promise<HttpResponse | null> {
     logger.debug(
-      `getManifestResponse(${registryHost}, ${dockerRepository}, ${tag})`
+      `getManifestResponse(${registryHost}, ${dockerRepository}, ${tag}, ${mode})`
     );
     try {
       const headers = await getAuthHeaders(