--- ../SuperCollider-Source/lang/LangPrimSource/PyrMathPrim.cpp.orig	2019-06-30 13:14:17.915818164 +0200
+++ ../SuperCollider-Source/lang/LangPrimSource/PyrMathPrim.cpp	2019-06-30 13:14:52.675990530 +0200
@@ -1400,11 +1400,11 @@
 	definePrimitive(base, index++, "_LaguerreAssoc", prBoostThreeArg<double, unsigned, double, double, boost::math::laguerre<double>>, 3, 0);
 	// Hermite
 	definePrimitive(base, index++, "_Hermite", prBoostTwoArg<double, unsigned, double, boost::math::hermite<double>>, 2, 0);
-	// Chebyshev
 	
-	definePrimitive(base, index++, "_ChebyshevT", prBoostCheby<double, boost::math::chebyshev_t<double>>, 2, 0);
-	definePrimitive(base, index++, "_ChebyshevU", prBoostCheby<double, boost::math::chebyshev_u<double>>, 2, 0);
-	definePrimitive(base, index++, "_ChebyshevTPrime", prBoostCheby<double, boost::math::chebyshev_t_prime<double>>, 2, 0);
+	// Chebyshev
+//	definePrimitive(base, index++, "_ChebyshevT", prBoostCheby<double, boost::math::chebyshev_t<double>>, 2, 0);
+//	definePrimitive(base, index++, "_ChebyshevU", prBoostCheby<double, boost::math::chebyshev_u<double>>, 2, 0);
+//	definePrimitive(base, index++, "_ChebyshevTPrime", prBoostCheby<double, boost::math::chebyshev_t_prime<double>>, 2, 0);
 	// Spherical Harmonics
 	definePrimitive(base, index++, "_SphericalHarmonic", prSphericalHarmonic, 4, 0);
 	definePrimitive(base, index++, "_SphericalHarmonicR", prBoostFourArg<double, unsigned, int, double, double, boost::math::spherical_harmonic_r<double>>, 4, 0);