diff --git a/src/core.rs b/src/core.rs
index ac8755e..2e1c2a7 100644
--- a/src/core.rs
+++ b/src/core.rs
@@ -493,15 +493,13 @@ impl GlobalTransformExt for GlobalTransform {
     ) -> String {
         use bevy::math::Vec3Swizzles;
         let scale = PHYSICS_SCALE.read().unwrap();
-        let (_, rotation, _) = self.to_scale_rotation_translation();
         let pos1 = Isometry::new(
             (self.translation() / *scale).xy().into(),
-            rotation.to_scaled_axis().z,
+            self.yaw().radians(),
         );
-        let (_, other_rotation, _) = self.to_scale_rotation_translation();
         let pos2 = Isometry::new(
             (other.translation() / *scale).xy().into(),
-            other_rotation.to_scaled_axis().z,
+            other.yaw().radians(),
         );
         let closest =
             closest_points(&pos1, &*collider.raw, &pos2, &*other_collider.raw, f32::MAX).unwrap();