diff --git a/bilby/gw/source.py b/bilby/gw/source.py
index 6f1253f131602ebe4b2a1718377fa993aeafca6c..bee8ca811f2866b7a14c27784be4eb2ecddde1f4 100644
--- a/bilby/gw/source.py
+++ b/bilby/gw/source.py
@@ -402,7 +402,7 @@ def roq(frequency_array, mass_1, mass_2, luminosity_distance, a_1, tilt_1,
         iota = theta_jn
     else:
         iota, spin_1x, spin_1y, spin_1z, spin_2x, spin_2y, spin_2z = \
-            lalsim_SimInspiralTransformPrecessingNewInitialConditions(
+            transform_precessing_spins(
                 theta_jn, phi_jl, tilt_1, tilt_2, phi_12, a_1, a_2, mass_1,
                 mass_2, reference_frequency, phase)