diff --git a/dash/dash.py b/dash/dash.py
index 71bf360834..d2f6b8fe5b 100644
--- a/dash/dash.py
+++ b/dash/dash.py
@@ -2171,7 +2171,7 @@ def _import_layouts_from_pages(self):
                         continue
 
                 page_filename = os.path.join(root, file).replace("\\", "/")
-                _, _, page_filename = page_filename.partition(walk_dir + "/")
+                _, _, page_filename = page_filename.partition(walk_dir.replace("\\", "/") + "/")
                 page_filename = page_filename.replace(".py", "").replace("/", ".")
 
                 pages_folder = (