diff --git a/Pose2Sim/calibration.py b/Pose2Sim/calibration.py
index 9fbb4ca..1bc5323 100644
--- a/Pose2Sim/calibration.py
+++ b/Pose2Sim/calibration.py
@@ -690,7 +690,7 @@ def calibrate_extrinsics(calib_dir, extrinsics_config_dict, C, S, K, D):
 
             # Find corners or label by hand
             if extrinsics_method == 'board':
-                imgp, objp_not_used = findCorners(img_vid_files[0], extrinsics_corners_nb, objp=object_coords_3d, show=show_reprojection_error)
+                imgp, objp = findCorners(img_vid_files[0], extrinsics_corners_nb, objp=object_coords_3d, show=show_reprojection_error)
                 if imgp == []:
                     logging.exception('No corners found. Set "show_detection_extrinsics" to true to click corners by hand, or change extrinsic_board_type to "scene"')
                     raise ValueError('No corners found. Set "show_detection_extrinsics" to true to click corners by hand, or change extrinsic_board_type to "scene"')