diff --git a/PathPlanning/BSplinePath/bspline_path.py b/PathPlanning/BSplinePath/bspline_path.py
index d4b24c76..7c59e99b 100644
--- a/PathPlanning/BSplinePath/bspline_path.py
+++ b/PathPlanning/BSplinePath/bspline_path.py
@@ -11,7 +11,7 @@ import matplotlib.pyplot as plt
 import scipy.interpolate as scipy_interpolate
 
 
-def approximate_b_spline_path(x: list, y: list, n_path_points: int,
+def approximate_b_spline_path(x: int, y: list, n_path_points: int,
                               degree: int = 3) -> tuple:
     """
     approximate points with a B-Spline path