diff --git a/rpi/services/detection_service.py b/rpi/services/detection_service.py
index efd27e94..d1374206 100644
--- a/rpi/services/detection_service.py
+++ b/rpi/services/detection_service.py
@@ -62,10 +62,13 @@ class DetectionService:
         edges_prediction = result["edges"]
         pieces_prediction = result["pieces"]
 
-        warped_corners, matrix = self.board_manager.process_frame(edges_prediction[0], frame, self.scale_size)
-        if matrix is None:
+        processed_frame = self.board_manager.process_frame(edges_prediction[0], frame, self.scale_size)
+        if processed_frame is None:
             return None
 
+        warped_corners = processed_frame[0]
+        matrix = processed_frame[1]
+
         detections = self.pieces_manager.extract_pieces(pieces_prediction)
 
         board = self.pieces_manager.pieces_to_board(detections, warped_corners, matrix, self.scale_size)