diff --git a/Question_21_30/answers_py/answer_29.py b/Question_21_30/answers_py/answer_29.py
index 07404c70..0de73789 100644
--- a/Question_21_30/answers_py/answer_29.py
+++ b/Question_21_30/answers_py/answer_29.py
@@ -41,7 +41,7 @@ def affine(img, a, b, c, d, tx, ty):
 _img = cv2.imread("imori.jpg").astype(np.float32)
 
 # Affine
-out = affine(img, a=1.3, b=0, c=0, d=0.8, tx=30, ty=-30)
+out = affine(_img, a=1.3, b=0, c=0, d=0.8, tx=30, ty=-30)
 
 
 # Save result