diff --git a/gstlal-inspiral/bin/gstlal_inspiral_create_prior_diststats b/gstlal-inspiral/bin/gstlal_inspiral_create_prior_diststats
index 42476d3b63577735d173cefc89d6c6a851c05236..a909a7729ceede0f2dad1038061017ba1521f797 100755
--- a/gstlal-inspiral/bin/gstlal_inspiral_create_prior_diststats
+++ b/gstlal-inspiral/bin/gstlal_inspiral_create_prior_diststats
@@ -140,7 +140,7 @@ if options.background_prior > 0:
 	rankingstat.denominator.add_noise_model(number_of_events = options.background_prior)
 
 if options.synthesize_numerator:
-	rankingstat.numerator.add_signal_model(df = 40)
+	rankingstat.numerator.add_signal_model()
 
 
 #