diff --git a/public/klein/util.hpp b/public/klein/util.hpp
index 801d172..43a42e4 100644
--- a/public/klein/util.hpp
+++ b/public/klein/util.hpp
@@ -12,39 +12,39 @@
 namespace kln
 {
 template <typename T>
-constexpr T pi_v = 3.141592653589793238462643383279502884L;
+constexpr T pi_v = (T)3.141592653589793238462643383279502884L;
 
 constexpr float pi = pi_v<float>;
 
 template <typename T>
-constexpr T pi_2_v = 1.570796326794896619231321691639751442L;
+constexpr T pi_2_v = (T)1.570796326794896619231321691639751442L;
 
 constexpr float pi_2 = pi_2_v<float>;
 
 template <typename T>
-constexpr T pi_4_v = 0.785398163397448309615660845819875721L;
+constexpr T pi_4_v = (T)0.785398163397448309615660845819875721L;
 
 constexpr float pi_4 = pi_4_v<float>;
 
 /// tau = 2 * pi
 template <typename T>
-constexpr T tau_v = 6.28318530717958647692528676655900577L;
+constexpr T tau_v = (T)6.28318530717958647692528676655900577L;
 
 constexpr float tau = tau_v<float>;
 
 template <typename T>
-constexpr T e_v = 2.718281828459045235360287471352662498L;
+constexpr T e_v = (T)2.718281828459045235360287471352662498L;
 
 constexpr float e = e_v<float>;
 
 template <typename T>
-constexpr T sqrt2_v = 1.414213562373095048801688724209698079L;
+constexpr T sqrt2_v = (T)1.414213562373095048801688724209698079L;
 
 constexpr float sqrt2 = sqrt2_v<float>;
 
 /// sqrt(2) / 2 = 1 / sqrt(2)
 template <typename T>
-constexpr T sqrt2_2_v = 0.707106781186547524400844362104849039L;
+constexpr T sqrt2_2_v = (T)0.707106781186547524400844362104849039L;
 
 constexpr float sqrt2_2 = sqrt2_2_v<float>;
 } // namespace kln
\ No newline at end of file