diff --git a/samples/python/mosse.py b/samples/python/mosse.py
index e11e9215c6..04d3cf8763 100755
--- a/samples/python/mosse.py
+++ b/samples/python/mosse.py
@@ -107,7 +107,7 @@ class MOSSE:
         h, w = f.shape
         f = np.roll(f, -h//2, 0)
         f = np.roll(f, -w//2, 1)
-        kernel = np.uint8( (f-f.min()) / f.ptp()*255 )
+        kernel = np.uint8( (f-f.min()) / np.ptp(f)*255 )
         resp = self.last_resp
         resp = np.uint8(np.clip(resp/resp.max(), 0, 1)*255)
         vis = np.hstack([self.last_img, kernel, resp])
diff --git a/samples/python/turing.py b/samples/python/turing.py
index dc920d1295..d8f517cf9f 100755
--- a/samples/python/turing.py
+++ b/samples/python/turing.py
@@ -62,7 +62,7 @@ def main():
             vs.append(v)
         mi = np.argmin(vs, 0)
         a += np.choose(mi, ms) * 0.025
-        a = (a-a.min()) / a.ptp()
+        a = (a-a.min()) / np.ptp(a)
 
         if out:
             out.write(a)