diff --git a/samples/python2/turing.py b/samples/python2/turing.py
index 84517e1c8dd166c57af5c2f4c124402252b7cba0..f190c3dfd1561e96bbebf7fe636cd4b0048e38b1 100644
--- a/samples/python2/turing.py
+++ b/samples/python2/turing.py
@@ -9,9 +9,8 @@ from common import draw_str
 
 w, h = 512, 512
 
-a = np.zeros((h, w, 1), np.float32)
+a = np.zeros((h, w), np.float32)
 cv2.randu(a, np.array([0]), np.array([1]))
-a.shape = (h, w)
 
 def process_scale(a_lods, lod):
     d = a_lods[lod] - cv2.pyrUp(a_lods[lod+1])