diff --git a/src/calibre/ebooks/oeb/polish/check/main.py b/src/calibre/ebooks/oeb/polish/check/main.py
index bdb54a99e5..0a7feb6ff3 100644
--- a/src/calibre/ebooks/oeb/polish/check/main.py
+++ b/src/calibre/ebooks/oeb/polish/check/main.py
@@ -74,8 +74,8 @@ def run_checks(container):
     errors += check_mimetypes(container)
     errors += check_links(container) + check_link_destinations(container)
     errors += check_fonts(container)
-    errors += check_filenames(container)
     errors += check_ids(container)
+    errors += check_filenames(container)
     errors += check_markup(container)
     errors += check_opf(container)