diff --git a/label_studio_converter/converter.py b/label_studio_converter/converter.py
index 86bac55..fe55441 100644
--- a/label_studio_converter/converter.py
+++ b/label_studio_converter/converter.py
@@ -554,7 +554,7 @@ def add_image(images, width, height, image_id, image_path):
             for label in labels:
 
                 category_name = None
-                for key in ['rectanglelabels', 'polygonlabels', 'brushlabels' 'labels']:
+                for key in ['rectanglelabels', 'polygonlabels', 'brushlabels', 'labels']:
                     if key in label and len(label[key]) > 0:
                         category_name = label[key][0]
                         break