diff --git a/examples2d/character_controller2.rs b/examples2d/character_controller2.rs
index 4df9f51..e964a02 100644
--- a/examples2d/character_controller2.rs
+++ b/examples2d/character_controller2.rs
@@ -1,3 +1,4 @@
+use std::f32::consts::PI;
 use rapier2d::prelude::*;
 use rapier_testbed2d::Testbed;