diff --git a/few/trajectory/inspiral.py b/few/trajectory/inspiral.py
index f3eed82f..96c7eb29 100644
--- a/few/trajectory/inspiral.py
+++ b/few/trajectory/inspiral.py
@@ -375,6 +375,8 @@ def get_rhs_ode(
 
         y0 = np.array([y1, y2, y3, Phi_phi0, Phi_theta0, Phi_r0])
 
-        out = self.inspiral_generator.func(np.r_[y0, *args])
+        y0_and_args = np.concatenate(([y0], args))
+        out = self.inspiral_generator.func(y0_and_args)
+        # out = self.inspiral_generator.func(np.r_[y0, *args])
 
         return out