diff --git a/wpimath/src/main/native/include/frc/geometry/Rotation2d.inc b/wpimath/src/main/native/include/frc/geometry/Rotation2d.inc
index eb31ebded6..dbe9e3596e 100644
--- a/wpimath/src/main/native/include/frc/geometry/Rotation2d.inc
+++ b/wpimath/src/main/native/include/frc/geometry/Rotation2d.inc
@@ -23,7 +23,8 @@ constexpr Rotation2d::Rotation2d(units::degree_t value)
     : Rotation2d(units::radian_t{value}) {}
 
 constexpr Rotation2d::Rotation2d(double x, double y) {
-  const auto magnitude = gcem::hypot(x, y);
+  double magnitude =
+      std::is_constant_evaluated() ? gcem::hypot(x, y) : std::hypot(x, y);
   if (magnitude > 1e-6) {
     m_sin = y / magnitude;
     m_cos = x / magnitude;