diff --git a/example/GW150914_IMRPhenomPV2.py b/example/GW150914_IMRPhenomPV2.py
index 08f48dac..a75a219f 100644
--- a/example/GW150914_IMRPhenomPV2.py
+++ b/example/GW150914_IMRPhenomPV2.py
@@ -25,7 +25,6 @@
     GeocentricArrivalTimeToDetectorArrivalTimeTransform,
     GeocentricArrivalPhaseToDetectorArrivalPhaseTransform,
 )
-from jimgw.single_event.utils import Mc_q_to_m1_m2
 from flowMC.strategy.optimization import optimization_Adam
 from jimgw.single_event import data as jd