diff --git a/Spherical.cpp b/Spherical.cpp
index 6143ee9..3fc8666 100644
--- a/Spherical.cpp
+++ b/Spherical.cpp
@@ -61,7 +61,7 @@ SphericalOf<T> SphericalOf<T>::FromVector3(Vector3 v) {
     return SphericalOf(distance, AngleOf<T>(), AngleOf<T>());
   } else {
     AngleOf<T> verticalAngle =
-        AngleOf<T>::Radians((90.0f - acosf(v.Up() / distance)));
+        AngleOf<T>::Radians((pi / 2 - acosf(v.Up() / distance)));
     AngleOf<T> horizontalAngle =
         AngleOf<T>::Radians(atan2f(v.Right(), v.Forward()));
     return SphericalOf(distance, horizontalAngle, verticalAngle);