diff --git a/manimlib/mobject/mobject.py b/manimlib/mobject/mobject.py
index 356ac128..5dc90240 100644
--- a/manimlib/mobject/mobject.py
+++ b/manimlib/mobject/mobject.py
@@ -3,6 +3,7 @@ import itertools as it
 import random
 import sys
 import moderngl
+import math
 from functools import wraps
 
 import numpy as np
@@ -843,7 +844,7 @@ class Mobject(object):
             angle_of_vector(target_vect) - angle_of_vector(curr_vect),
         )
         self.rotate(
-            math.atan2(target_vect[2], np.sqrt(target_vect[0]**2 + target_vect[1]**2)) - math.atan2(curr_vect[2], np.sqrt(curr_vect[0]**2 + curr_vect[1]**2)), 
+            math.atan2(target_vect[2], get_norm(target_vect[:2])) - math.atan2(curr_vect[2], get_norm(curr_vect[:2])), 
             axis = np.array([-target_vect[1], target_vect[0], 0]),
         )
         self.shift(start - self.get_start())