diff --git a/src/storage/noop.js b/src/storage/noop.js
index 24bc35278..40e24d09c 100644
--- a/src/storage/noop.js
+++ b/src/storage/noop.js
@@ -92,7 +92,7 @@ async function remove(apiConfig, filename) {
     debug(`remove: ${filename}`);
 }
 
-function removeDir(apiConfig, pathPrefix, progressCallback) {
+async function removeDir(apiConfig, pathPrefix, progressCallback) {
     assert.strictEqual(typeof apiConfig, 'object');
     assert.strictEqual(typeof pathPrefix, 'string');
     assert.strictEqual(typeof progressCallback, 'function');