diff --git a/replace_nfo.py b/replace_nfo.py
index 080c2b7..6bfc793 100755
--- a/replace_nfo.py
+++ b/replace_nfo.py
@@ -27,7 +27,7 @@ def update_target_file(source_tree, target_tree):
 def process_files(source_dir, target_dir):
     """Process all .nfo files in source_dir and update matching files in target_dir."""
     source_files = glob.glob(os.path.join(source_dir, "*.nfo"))
-    target_files = re.sub(r'(\[|\])', r'[\1]', target_files)
+    target_dir = re.sub(r'(\[|\])', r'[\1]', target_dir)
     target_files = glob.glob(os.path.join(target_dir, "*.nfo"))
 
     for src_file in source_files: