diff --git a/export-video.py b/export-video.py
index 6fcb6a3..c3e7dfd 100755
--- a/export-video.py
+++ b/export-video.py
@@ -94,7 +94,7 @@ def list_file(directory, pattern, recursive):
         if os.path.isdir(directory + "/" + i) and recursive:
             logging.info('directory found : %s', i)
             files_list.extend(list_file(
-                directory + "/" + i,
+                os.path.join(directory, i),
                 pattern,
                 recursive
             ))