diff --git a/doc/py_tutorials/py_calib3d/py_calibration/py_calibration.markdown b/doc/py_tutorials/py_calib3d/py_calibration/py_calibration.markdown
index bba7b90b9f..182f1c845b 100644
--- a/doc/py_tutorials/py_calib3d/py_calibration/py_calibration.markdown
+++ b/doc/py_tutorials/py_calib3d/py_calibration/py_calibration.markdown
@@ -127,7 +127,7 @@ for fname in images:
         objpoints.append(objp)
 
         corners2 = cv.cornerSubPix(gray,corners, (11,11), (-1,-1), criteria)
-        imgpoints.append(corners)
+        imgpoints.append(corners2)
 
         # Draw and display the corners
         cv.drawChessboardCorners(img, (7,6), corners2, ret)