diff --git a/plotting.py b/plotting.py
index 35d52ab..7ce12b1 100644
--- a/plotting.py
+++ b/plotting.py
@@ -78,7 +78,7 @@ def prepare_image(image_path: str, bounding_boxes, all_labels, nb_pages):
         label = bbox.get("label")
         if label and label in all_labels:
             current_index = all_labels.index(label)
-            if current_index < last_label_index:
+            if current_index < last_label_index or (last_label_index == -1 and current_index != 0):
                 color = "red"
             last_label_index = current_index