diff --git a/docs/lang/articles/get-started/cloth_simulation.md b/docs/lang/articles/get-started/cloth_simulation.md
index 8f1a805c9296c..1ffb40c482f81 100644
--- a/docs/lang/articles/get-started/cloth_simulation.md
+++ b/docs/lang/articles/get-started/cloth_simulation.md
@@ -295,7 +295,7 @@ def substep():
         if offset_to_center.norm() <= ball_radius:
             # Velocity projection
             normal = offset_to_center.normalized()
-            v[i] -= min(v[i].dot(normal), 0) * normal
+            v[i] -= ti.min(v[i].dot(normal), 0) * normal
         # After working out the accumulative v[i],
         # work out the positions of each mass point
         x[i] += dt * v[i]
@@ -451,7 +451,7 @@ def substep():
         if offset_to_center.norm() <= ball_radius:
             # Velocity projection
             normal = offset_to_center.normalized()
-            v[i] -= min(v[i].dot(normal), 0) * normal
+            v[i] -= ti.min(v[i].dot(normal), 0) * normal
         x[i] += dt * v[i]
 
 @ti.kernel