diff --git a/GPy/kern/__init__.py b/GPy/kern/__init__.py
index d8239910..3c367ddc 100644
--- a/GPy/kern/__init__.py
+++ b/GPy/kern/__init__.py
@@ -24,6 +24,8 @@ from .src.ODE_st import ODE_st
 from .src.ODE_t import ODE_t
 from .src.poly import Poly
 from .src.eq_ode2 import EQ_ODE2
+from .src.tie import Tie
+from .src.offset import Offset
 from .src.integral import Integral
 from .src.integral_limits import Integral_Limits
 from .src.multidimensional_integral_limits import Multidimensional_Integral_Limits