diff --git a/physics/horizontal_projectile_motion.py b/physics/horizontal_projectile_motion.py
index 7147da194..7ec370579 100644
--- a/physics/horizontal_projectile_motion.py
+++ b/physics/horizontal_projectile_motion.py
@@ -15,7 +15,6 @@ For more info: https://en.wikipedia.org/wiki/Projectile_motion
 """
 
 # Importing packages
-from math import pi
 from math import radians as angle_to_radians
 from math import sin