diff --git a/tools/manifestfile.py b/tools/manifestfile.py
index c1fc836585fb..beaa36d0f5fc 100644
--- a/tools/manifestfile.py
+++ b/tools/manifestfile.py
@@ -291,7 +291,7 @@ def _add_file(self, full_path, target_path, kind=KIND_AUTO, opt=None):
     def _search(self, base_path, package_path, files, exts, kind, opt=None, strict=False):
         base_path = self._resolve_path(base_path)
 
-        if files:
+        if files is not None:
             # Use explicit list of files (relative to package_path).
             for file in files:
                 if package_path: