diff --git a/dashboard/src/models/DirectoryModel.js b/dashboard/src/models/DirectoryModel.js
index 9e2469600..602cae4a3 100644
--- a/dashboard/src/models/DirectoryModel.js
+++ b/dashboard/src/models/DirectoryModel.js
@@ -187,7 +187,7 @@ export function createDirectoryModel(origin, accessToken, api) {
           if (action === 'copy') result = await this.copy(this.buildFilePath(files[f].folderPath, files[f].name), targetPath);
 
           if (result.status === 404) {
-            throw `Source file ${files[f].name} not found`;
+            throw `Source file "${files[f].name}" not found`;
           } else if (result.status === 409) {
             targetPath += '-copy';
             continue;