diff --git a/demo/predictor.py b/demo/predictor.py
index ad7c83e2f..49d76f81e 100644
--- a/demo/predictor.py
+++ b/demo/predictor.py
@@ -135,7 +135,7 @@ def __init__(
         show_mask_heatmaps=False,
         masks_per_dim=2,
         min_image_size=224,
-        weight_loading = None
+        weight_loading=None
     ):
         self.cfg = cfg.clone()
         self.model = build_detection_model(cfg)