diff --git a/direct/src/showutil/dist.py b/direct/src/showutil/dist.py
index 2ff22f07ca..7a43982a22 100644
--- a/direct/src/showutil/dist.py
+++ b/direct/src/showutil/dist.py
@@ -275,7 +275,7 @@ class build_apps(distutils.core.Command):
         def dir_has_files(directory):
             files = [
                 i for i in os.listdir(directory)
-                if not check_pattern(os.path.join(directory, i))
+                if not check_pattern(os.path.normpath(os.path.join(directory, i)))
             ]
             return bool(files)