diff --git a/tupak/sampler.py b/tupak/sampler.py
index 5b431b896219f113d4175086909be0e5e01f662a..805cd87bf10b8e695f66a1d3001af36fb4e60c97 100644
--- a/tupak/sampler.py
+++ b/tupak/sampler.py
@@ -466,7 +466,8 @@ def run_sampler(likelihood, priors=None, label='label', outdir='outdir',
             result.log_bayes_factor = result.logz - result.noise_logz
         if injection_parameters is not None:
             result.injection_parameters = injection_parameters
-            tupak.conversion.generate_all_bbh_parameters(result.injection_parameters)
+            if conversion_function is not None:
+                conversion_function(result.injection_parameters)
         result.fixed_parameter_keys = [key for key in priors if isinstance(key, prior.DeltaFunction)]
         # result.prior = prior  # Removed as this breaks the saving of the data
         result.samples_to_data_frame(likelihood=likelihood, priors=priors, conversion_function=conversion_function)